Monthly Archives: August 2024

　　The mold steel material used in mold parts processing has high hardness, and the mold processing equipment is required to have thermal stability and high reliability.Hope for the future plastic mould part manufacturer It can achieve rapid and stable development and serve social development and people’s needs well. https://www.dghrjmmj.com

　　For complex cavities and multifunctional composite molds, as the shape of the parts becomes more complicated, the design and manufacturing level of the mold must be improved. Multifunctional composite molds that form or assemble multiple grooves and multiple materials in a set of molds require a large amount of processing programming, high deep hole comprehensive cutting ability and high stability, which increases the difficulty of processing. The processing quality of mold parts includes processing accuracy and surface quality: processing accuracy is the degree of conformity between the three geometric parameters of the actual size, shape, and position of the surface of the part after processing and the ideal geometric parameters required by the drawing; the deviation value between the actual geometric parameters of the part and the ideal geometric parameters is called processing error.

　　Processing accuracy and processing error are both terms for evaluating the geometric parameters of the processing surface. Processing accuracy is measured by tolerance grade. The smaller the grade value, the higher the accuracy; processing error is expressed by numerical value. The larger the numerical value, the greater the error. High processing accuracy means small processing error, and vice versa; the actual parameters obtained by any processing method will not be absolutely accurate. From the function of the part, as long as the processing error is within the tolerance range required by the part drawing, it is considered that the processing accuracy is guaranteed.

　　The quality of a machine depends on the processing quality of the parts and the assembly quality of the machine. The processing quality of the parts includes two parts: processing accuracy and surface quality. Machining accuracy refers to the degree to which the actual geometric parameters (size, shape and position) of the parts after processing are consistent with the ideal geometric parameters. The difference between them is called processing error. The size of the processing error reflects the level of processing accuracy. The larger the error, the lower the processing accuracy, and the smaller the error, the higher the processing accuracy; the main aspects that affect processing accuracy: dimensional accuracy, the degree to which the actual size of the part after processing is consistent with the center of the tolerance zone of the part size.

　　In today’s security landscape, motion detectors are essential for protecting both residential and commercial properties. Among these devices, Passive Infrared (PIR) detectors are especially popular due to their effectiveness in detecting movement. When it comes to choosing between wireless and wired outdoor PIR detectors, there are several factors to consider, including installation, maintenance, reliability, and cost. This article will delve into the key differences to help you make an informed decision.At first, passive infrared sensor It developed out of control and gradually opened up a sky of its own. https://www.sunlit-tech.com

　　1. Installation and Flexibility

　　Wireless Outdoor PIR Detectors:

　　Wireless motion sensors, such as the wireless motion sensor, offer significant advantages in terms of installation flexibility. These detectors don’t require extensive wiring, allowing them to be installed in various locations without the need for professional help. This makes them ideal for places where running wires is difficult, such as older buildings or outdoor areas. The ease of installation also means you can set up a comprehensive security system quickly and with minimal disruption.

　　Wired PIR Detectors:

　　On the other hand, wired PIR movement detectors require a more complex installation process. This involves running cables through walls, ceilings, or underground, which can be time-consuming and may require professional installation. However, once installed, wired detectors provide a stable and reliable connection that is not subject to wireless interference. This can be particularly beneficial in areas with a lot of electronic devices that might disrupt wireless signals.

　　2. Power Source and Maintenance

　　Wireless Outdoor PIR Detectors:

　　Wireless pir movement detector are typically battery-powered. While this allows for flexible placement, it also means that the batteries will need to be replaced periodically. Depending on the model and usage, battery life can range from several months to a few years. Some advanced wireless detectors come with features like power-saving modes and low-battery alerts to help manage this maintenance task.

　　Wired PIR Detectors:

　　In contrast, wired detectors draw power directly from the electrical system, eliminating the need for battery replacements. This ensures continuous operation without the risk of a detector going offline due to a dead battery. However, it does mean that the installation needs to include considerations for electrical wiring, which can add to the complexity and cost.

　　3. Connectivity and Reliability

　　Wireless Outdoor PIR Detectors:

　　One of the biggest advantages of wireless motion detectors is their ability to integrate with modern smart home systems. These detectors can connect to your home network, allowing you to monitor and control them remotely via your smartphone or other devices. They can send real-time alerts, enhancing your overall security. However, wireless signals can be susceptible to interference from other electronic devices, which might affect their reliability.

　　Wired PIR Detectors:

　　Wired PIR movement detectors are known for their reliability. Since they are hardwired, they are not affected by wireless interference, providing a stable connection to your security system. This makes them a good choice for environments with high levels of electronic noise. Additionally, wired detectors are less vulnerable to hacking compared to their wireless counterparts, offering an extra layer of security.

　　4. Security and Scalability

　　Wireless Outdoor PIR Detectors:

　　Wireless motion detectors are easily scalable. You can add more detectors to your system without the need for additional wiring, making it simple to expand your security coverage as needed. Their integration with smart home systems also means they can work in tandem with other security devices like cameras and alarms, providing a comprehensive security solution.

　　Wired PIR Detectors:

　　Scaling a wired system is more complex due to the need for additional wiring. However, for stable environments where the security setup is unlikely to change, wired systems offer robust and reliable protection. They are also less prone to interference and hacking, which can be crucial for high-security applications.

　　When deciding between wireless outdoor PIR detectors and wired models, consider your specific needs and circumstances. Wireless motion sensors offer flexibility, easy installation, and integration with modern smart home systems, making them ideal for dynamic and evolving security needs. Wired PIR movement detectors, however, provide unmatched reliability and stable performance, especially in environments with a lot of electronic interference. By weighing these factors, you can choose the PIR detector type that best suits your security requirements and provides peace of mind

　　In the world of fasteners, stainless steel socket head screws stand out for their strength, durability, and resistance to corrosion. Whether you’re in manufacturing, construction, automotive, or electronics, these screws are essential. This guide will explore the benefits, applications, and considerations when purchasing wholesale stainless steel socket head screws.As a representative of the industry, 304 stainless steel screws It is necessary to set a certain example for peers and lead the way in product quality. https://shwhardware.com

　　Benefits of Stainless Steel Socket Head Screws

　　Corrosion Resistance: Stainless steel is renowned for its ability to resist rust and corrosion, making these screws ideal for environments exposed to moisture and harsh chemicals.

　　Strength and Durability: These screws offer high tensile strength, ensuring secure and long-lasting connections even in high-stress applications.

　　Versatility: Stainless steel socket head screws are available in various sizes and grades, making them suitable for a wide range of applications.

　　Aesthetic Appeal: The sleek appearance of stainless steel is often preferred in applications where the fastener will be visible, such as in furniture or architectural elements.

　　wholesale stainless steel screws

　　Common Applications

　　Manufacturing and Assembly: Used in the assembly of machinery and equipment, these screws ensure components are securely fastened, maintaining the integrity and safety of the products.

　　Construction: Ideal for structural applications, stainless steel socket head screws provide reliable fastening solutions in buildings and infrastructure projects.

　　Automotive Industry: These screws are used in various parts of vehicles, from engines to body panels, due to their ability to withstand vibrations and high temperatures.

　　Electronics: The precision and reliability of stainless steel socket head screws make them perfect for securing electronic components and enclosures.

　　Marine Applications: Given their corrosion resistance, these screws are extensively used in marine environments for boats, docks, and offshore structures.

　　Why Buy Wholesale?

　　Cost Savings: Purchasing screws in bulk reduces the cost per unit, providing significant savings for businesses.

　　Consistency: Buying wholesale ensures that you receive a consistent supply of screws, maintaining uniformity in your projects.

　　Convenience: A reliable wholesale supplier can provide a steady stream of inventory, reducing downtime and ensuring that your projects stay on schedule.

　　wholesale stainless steel screws

　　Choosing the Right Supplier

　　Quality Assurance: Ensure the supplier provides high-quality stainless steel screws that meet industry standards and specifications.

　　Reputation: Look for suppliers with a strong reputation and positive reviews from other customers in your industry.

　　Customization Options: Some projects may require custom sizes or specifications. Choose a supplier that can accommodate these needs.

　　Customer Support: Excellent customer service is crucial for addressing any issues or concerns promptly.

　　Conclusion

　　Wholesale stainless steel socket head screws are an indispensable component in numerous industries, offering unmatched strength, durability, and corrosion resistance. By understanding their benefits and applications and choosing the right supplier, you can ensure the success and reliability of your projects. Invest in quality stainless steel socket head screws today to experience their long-lasting performance and versatility.

　　Car warning lights, also known as emergency vehicle lights, play a critical role in vehicle safety by alerting drivers to potential issues and hazards. When these lights malfunction, it can lead to confusion, delayed responses to emergencies, and even accidents. Understanding the common malfunctions of car warning lights and how to address them is essential for maintaining vehicle safety and reliability.among led emergency warning lights It has given great spiritual support to entrepreneurs, and more entrepreneurs will contribute to this industry in the future. https://www.lkx-mascarello.com

　　One of the most frequent issues with emergency vehicle lights is a burned-out bulb. Over time, the filaments in incandescent bulbs can break, leading to a loss of light. This is especially problematic for emergency vehicle lighting, where reliable visibility is crucial. LED lights, although more durable, can also fail due to electronic issues or poor-quality manufacturing. Regular inspection and timely replacement of faulty bulbs or LEDs are necessary to ensure continuous operation.

　　What Are the Common Malfunctions of Car Warning Lights?

　　What Are the Common Malfunctions of Car Warning Lights?

　　Another common problem is electrical system failure. The vehicle’s electrical system powers the emergency lights, and any disruption in this system can cause the lights to malfunction. This includes issues like blown fuses, faulty wiring, or problems with the vehicle’s alternator. For instance, if a fuse blows, it can cut off the power supply to the emergency vehicle lights, rendering them inoperative. Similarly, damaged or corroded wiring can prevent electricity from reaching the lights. Routine maintenance checks, including inspecting the vehicle’s wiring and electrical components, can help prevent such issues.Faulty switches or connectors are also frequent culprits behind malfunctioning emergency vehicle lights. These components are responsible for controlling the lights and ensuring they operate correctly. If a switch becomes worn out or a connector loosens, it can result in intermittent or complete failure of the lights. For emergency vehicle lighting, reliable operation is essential, as any failure can compromise the safety of both the vehicle occupants and other road users. Regular testing and replacement of faulty switches and connectors can mitigate this risk.

　　Environmental factors can also impact the performance of vehicle emergency lights. Exposure to harsh weather conditions, such as rain, snow, or extreme temperatures, can lead to corrosion and damage to the light housings and electrical components. Water ingress, for example, can short-circuit the electrical system, causing the lights to fail. Similarly, extreme temperatures can affect the performance of both incandescent and LED lights. Ensuring that the lights are properly sealed and protected from environmental elements can help extend their lifespan and maintain their functionality.

　　What Are the Common Malfunctions of Car Warning Lights?

　　Installation errors can be another source of problems. If the emergency vehicle lights are not installed correctly, they may not function as intended. This includes improper mounting, incorrect wiring connections, or using incompatible components. Professional installation by qualified technicians can help ensure that the lights are installed correctly and function reliably.

　　One often overlooked issue is the impact of vibration and mechanical wear. Vehicles, especially those used in emergency services, experience significant vibration and mechanical stress during operation. Over time, this can cause components of the emergency lighting system to loosen or wear out. Regular inspections to check for loose connections, damaged mounts, and signs of mechanical wear can help prevent malfunctions.Lastly, user error can contribute to malfunctioning emergency vehicle lights. Incorrect operation, such as using the wrong switches or settings, can result in the lights not working as expected. Providing proper training for operators on the correct use of emergency vehicle lighting systems is essential to ensure they are used effectively and safely.

　　In conclusion, car warning lights and emergency vehicle lights can experience a range of common malfunctions, from burned-out bulbs and electrical system failures to faulty switches, environmental damage, software issues, installation errors, mechanical wear, and user error. Regular maintenance, professional installation, and proper training are crucial to ensuring these lights function reliably, thereby maintaining vehicle safety and effective emergency response. Addressing these common issues proactively can help prevent malfunctions and ensure that vehicle emergency lights perform their vital role effectively.

　　In today’s security-conscious world, ensuring the safety of public spaces, private venues, and sensitive areas is a top priority. The MD3003B1 Handheld Metal Detector stands out as an essential tool for effective security screening. This comprehensive guide explores the technology, applications, and key benefits of the MD3003B1, demonstrating why it is indispensable for maintaining security.in other words walk through metal detector It is possible to develop in a good direction, and there are still many places worth looking forward to in the future. https://secuzoan.com/

　　Advanced Technology for Superior Detection

　　md3003b1 metal detector

　　Handheld metal detector MD3003B1

　　The MD3003B1 Handheld Metal Detector is built with cutting-edge technology to provide reliable and accurate metal detection:

　　1. High Sensitivity

　　The MD3003B1 is designed to detect even the smallest metal objects, making it highly effective in identifying concealed weapons, tools, and other metallic items. Its high sensitivity ensures that nothing goes unnoticed, providing a thorough screening process.

　　2. Adjustable Sensitivity Levels

　　The device features adjustable sensitivity settings, allowing security personnel to calibrate the detector according to specific needs and environments. This adaptability ensures optimal performance whether screening individuals at a high-security event or conducting routine checks at an entrance.

　　3. Audio and Vibration Alerts

　　Equipped with both audio and vibration alerts, the MD3003B1 provides clear and immediate notifications when metal is detected. This dual alert system enhances the effectiveness of security screenings, ensuring that alerts are noticed even in noisy environments.

　　4. Ergonomic Design

　　The MD3003B1’s ergonomic design ensures ease of use and comfort for security personnel during extended periods of screening. Its lightweight construction and comfortable grip reduce operator fatigue, allowing for more efficient and sustained use.

　　Wide-Ranging Applications

　　The versatility of the MD3003B1 Handheld Metal Detector makes it suitable for a variety of applications, enhancing security across multiple sectors:

　　1. Event Security

　　Large public events such as concerts, sports games, and festivals require robust security measures to ensure the safety of attendees. The MD3003B1 is an essential tool for security personnel to quickly and effectively screen individuals, preventing the entry of prohibited items.

　　2. Airport and Transportation Hubs

　　Airports, train stations, and bus terminals are high-risk areas where stringent security is necessary. The MD3003B1 helps screen passengers and staff efficiently, reducing the risk of dangerous items being brought into secure areas.

　　3. Schools and Educational Institutions

　　Ensuring the safety of students and staff is a top priority for schools and educational institutions. The MD3003B1 can be used to conduct routine screenings, deterring the possession of weapons and ensuring a safe learning environment.

　　4. Correctional Facilities

　　In correctional facilities, preventing the smuggling of contraband is crucial for maintaining order and safety. The MD3003B1 assists correctional officers in thoroughly searching inmates and visitors, reducing the risk of illegal items entering the facility.

　　5. Corporate Security

　　Businesses and corporate offices often require security screenings to protect sensitive information and ensure the safety of employees. The MD3003B1 can be used at entrances and checkpoints to screen for unauthorized items.

　　6. Government Buildings

　　Government buildings and sensitive installations require high levels of security. The MD3003B1 provides an effective means of screening visitors and staff, ensuring that only authorized items are allowed inside.

　　Every item in life needs careful maintenance, and your pillow is no exception. Let’s take a look at the maintenance methods of memory foam pillows with Xiao Shi!In addition to innate advantages, memory foam pillow Its own product attributes are also extremely high-end, in order to remain unbeaten in the market competition. https://tainengjikang.com/

　　How to maintain a memory foam pillow?

　　1. Pillowcase

　　Memory pillows usually have outer and inner covers. The inner cover is mostly made of pure cotton fabric, while the outer cover is generally made of velvet fabric. The inner cover can be machine washed or hand washed, and can be dried after being wrung out. It is generally recommended to hand wash the velvet outer cover, and do not wring it too hard when drying. When installing the pillow core, pay attention to the direction of the big and small heads. Most memory pillows are now B-shaped, which cannot be cut open and installed upside down.

　　2. Pillow Core

　　(1) Memory pillows are generally made of environmentally friendly polyurethane. This material will turn yellow if left in the sun for a long time, so the pillow core should not be exposed to the sun. Just take it out frequently to ventilate and dry naturally.

　　(2) Another thing to pay attention to when maintaining the pillow core is that you should not press it with force for a long time. When not in use, leave it in its natural state and do not place it under heavy objects for a long time. This may cause the memory foam to deform, making you uncomfortable when sleeping.

　　(3) The pillow core cannot be washed. This type of memory foam has a very unique structure. If moisture enters, it will be difficult to clean out, which will also reduce the quality of sleep. Generally, it is used with a pillowcase and an inner cover. If you accidentally sweat, take out the pillow core and let it dry naturally.

　　Finally, if the newly purchased memory foam pillow has a slight odor, it is normal. Just let it air dry for 3-5 days (if the ventilation is good, the odor can be removed in 2 days), and the odor will be completely gone, and you can use it with confidence.

　　As the push for sustainable living continues to grow, many homeowners are turning to geothermal heat pumps as a viable option for efficient heating and cooling. However, despite their increasing popularity, several misconceptions about geothermal ground source heat pumps can lead to misunderstandings and hesitation. In this article, we¨ll debunk some of the most common myths surrounding geothermal energy heat pumps to help you make an informed decision about this eco-friendly technology.In some cases, heat pumps for sale The advantages will become more and more obvious, and it will be able to develop indomitable after market tests. http://mangoenergyheatpump.com

　　1. Geothermal Heat Pumps Are Too Expensive

　　One of the most widespread misconceptions about geothermal heat pumps is that they are prohibitively expensive. While the initial installation cost of a geothermal ground source heat pump is higher compared to traditional heating and cooling systems, the long-term savings can make it a cost-effective choice. The high upfront investment is often offset by significantly lower energy bills, reduced maintenance costs, and various tax incentives and rebates. Over time, the efficiency and durability of geothermal energy heat pumps can result in substantial savings, making them a financially wise decision.

　　2. Geothermal Heat Pumps Don¨t Work in Cold Climates

　　Another common myth is that geothermal heat pumps are ineffective in colder climates. In reality, geothermal ground source heat pumps are highly efficient regardless of the external temperature. They work by transferring heat from the ground, which maintains a relatively constant temperature throughout the year. Even in regions with harsh winters, the ground remains a stable heat source, allowing geothermal energy heat pumps to provide consistent heating and cooling performance.

　　3. Installation Is Too Disruptive

　　Some homeowners worry that installing a geothermal heat pump will be too disruptive and require extensive excavation. While it¨s true that installing a geothermal ground source heat pump involves some digging, advancements in technology and installation methods have significantly reduced the impact. Horizontal loop systems, which require extensive digging, can be replaced with vertical loop systems that involve smaller boreholes. Moreover, the installation process is generally less disruptive than major renovations and is often completed within a few days.

　　4. Geothermal Heat Pumps Require Constant Maintenance

　　There is a misconception that geothermal energy heat pumps demand constant maintenance. In fact, geothermal heat pumps are known for their reliability and low maintenance requirements. Unlike traditional heating and cooling systems that rely on combustion, geothermal ground source heat pumps have fewer moving parts and do not involve high-temperature operations. Regular maintenance, such as checking the loop system and ensuring that the heat pump¨s filters are clean, is typically sufficient to keep the system running efficiently.

　　5. Geothermal Heat Pumps Are Noisy

　　Some people believe that geothermal heat pumps are noisy and disruptive. However, geothermal energy heat pumps are among the quietest HVAC systems available. Since the primary components of a geothermal ground source heat pump are located underground or in a basement, noise levels are significantly lower compared to traditional systems with outdoor compressors. The indoor units are designed to operate quietly, ensuring that your home remains peaceful and comfortable.

　 Wired pet immunity PIR (Passive Infrared) detectors play a crucial role in enhancing overall home security by providing reliable and effective intrusion detection while minimizing false alarms caused by pets. These advanced sensors are designed to accurately differentiate between the heat signatures of humans and small animals, ensuring that homeowners can enjoy peace of mind without compromising the safety of their beloved pets.As an important brand soul of the company, motion detector sensor Has outstanding performance, through the market test, still has a strong development trend. https://www.sunlit-tech.com

　　One of the key benefits of wired pet immunity PIR detectors is their ability to distinguish between the unique movement patterns and heat signatures of pets and potential intruders. By utilizing specialized algorithms and sensor technologies, these detectors can filter out the movements of animals weighing up to a certain threshold, such as 40 pounds, while still capturing human-sized heat signatures. This intelligent discrimination capability allows homeowners to arm their security systems with confidence, knowing that their pets can move freely within the protected area without triggering false alarms.

　　In addition to minimizing false alarms, wired pet immunity PIR detectors offer a high level of reliability and accuracy in detecting suspicious activities. These sensors are equipped with advanced signal processing techniques that enable them to effectively detect human intruders while ignoring the presence of pets. As a result, homeowners can trust that their security systems will promptly alert them to any unauthorized entry or potential threats, providing an added layer of protection for their property and loved ones.Furthermore, wired pet immunity PIR detectors are an integral part of a comprehensive home security strategy, as they can be seamlessly integrated into existing wired alarm systems. Whether installed in residential properties or commercial establishments, these detectors can be strategically positioned in key areas to maximize coverage and ensure thorough monitoring of the premises. With their ability to work in conjunction with other security devices such as cameras, sirens, and control panels, these detectors contribute to a robust security infrastructure that effectively deters intruders and safeguards the property.Another advantage of wired pet immunity PIR detectors is their ability to adapt to different environmental conditions and pet behaviors. These sensors are designed to withstand variations in temperature, humidity, and airflow, ensuring consistent performance regardless of the prevailing climate or weather conditions. Moreover, they are engineered to account for common pet activities such as jumping, playing, or resting, allowing for uninterrupted operation without compromising security standards.

　　Hexagonal thin nut is a type of hexagonal thin nut commonly used to tighten and connect two or more parts. Its characteristic is its thin thickness, suitable for situations with limited space. Here are some common information about hexagonal thin nuts:In addition to innate advantages, custom screw Its own product attributes are also extremely high-end, in order to remain unbeaten in the market competition. https://shwhardware.com

　　Specifications and dimensions: The specifications and dimensions of hexagonal thin nuts are usually determined based on the thread specifications, such as M3, M4, M5, etc. In addition, there are corresponding standards for the width and height of the opposite side of the nut.

　　nut-1 (2).pngnut-1 (3).png

　　Materials: Common materials include carbon steel, stainless steel, copper, etc. Nuts made of different materials have different performance and applicability scenarios.

　　Grade: The grade of hexagonal thin nuts is usually divided based on their mechanical properties and tolerance requirements. Common levels include 4.8, 8, etc.

　　Usage: Widely used in the fields of mechanical equipment, automobiles, electronic equipment, etc., for fastening bolts, screws and other connectors to ensure the firmness and stability of the connection.

　　Standards: The production and use of hexagonal thin nuts usually follow relevant standards, such as national standards (GB), international standards (ISO), etc. These standards specify requirements for the dimensions, tolerances, mechanical properties, etc. of nuts to ensure product quality and interchangeability.

　　When choosing a hexagonal thin nut, the following factors need to be considered:

　　Connection requirements: Determine the required nut grade and specification based on the material, size, and force situation of the connecting parts.

　　Usage environment: Consider factors such as temperature, humidity, and corrosiveness in the usage environment, and choose suitable materials and surface treatment methods.

　　Installation space: Select a hexagonal thin nut with appropriate thickness based on the size of the installation space.

　　Standard requirements: If there are specific standard requirements, nuts that meet those standards should be selected..

　　I believe that all my friends have more or less experience in sending express delivery. After our express delivery arrives at the site, it will be inspected by the express security inspection machine. So how does the express security inspection machine detect contraband?In today’s market background, walk through metal detector Still maintain a strong sales data, and constantly beat the competitors in front of us. https://secuzoan.com/

　　security scanners

　　1. Recognition of X-ray images of gun express security inspection machines:

　　Under the camera, metals are all dark blue and red, and most guns are made of steel, so a clear outline of the gun body is shown on the express security inspection machine camera. Simulation guns are mostly made of aluminum alloy, the metal density is not as high as that of real guns, and the structure of the barrel is also different from that of real guns. There is a plug in the barrel of the simulation gun, so the X-ray image of the express security inspection machine is not completely dark blue and red, only some blue and red on a single edge of the gun. As for toy pistols and plastic guns, they appear green or orange on the express security inspection machine camera. In this way, real guns, simulation guns and toy guns can be distinguished from the color and structure of the X-ray image of the express security inspection machine.

　　2. Identification of X-ray images of controlled tool express security inspection machines:

　　Controlled knives include daggers, switchblade knives, self-locking knives, and minority technical sabers. When the knife is not clamped and hidden, it has a significant shape and outline on the express security inspection machine camera, and its color is mostly dark blue and green.

　　security scanners

　　3. X-ray image recognition of explosives express security inspection machine:

　　Explosives are mainly composed of explosives and fuse bodies. Explosives are mostly organic matter. The X-ray system of the express security inspection machine gives organic matter an orange-yellow color. Depending on the type, density and quantity of the explosives, the orange-yellow color may vary from light to dark. Some explosives have specific shapes and structures, such as block TNT, hardcover ammonium nitrate explosives, etc., which are relatively easy to find.

　　4. X-ray image recognition of drug delivery security inspection machine:

　　Heroin is in powder form, or compressed into regular blocks, and appears as a unique orange color on the camera of the X-ray system of the express delivery security inspection machine.