Monthly Archives: November 2024

　　A floor LED display is a personalized LED screen specially designed for floor display. Compared with the traditional LED display, the floor LED display adopts a special design in terms of load-bearing, protection performance, and heat dissipation performance. Its purpose is to make the floor tile screen adaptable to high-intensity stepping and long-term stable operation.This is due to led display Its value attribute is relatively large, and it is easy to become the backbone of the industry. https://www.atop-led.com/

　　With the continuous advancement of technology, LED display developers to combine display technology and sensing technology to develop an interactive led floor tile screen. The interactive led floor screen is equipped with pressure sensors, capacitive sensors, infrared sensors, and other equipment based on ordinary floor tile screens.

　　With the help of modern technology, the LED floor tile screen provides a more efficient means for stage performances, creating a more dreamy stage effect. At the same time, it also brings a more comfortable viewing experience to the audience.

　　If your project does not require an interactive system, the LED floor tile screen can use a common control system, such as Novastar, Colorlight, and Linsn. You need to pay attention to the load-bearing and outdoor waterproof problems of the dance floor screen. The following picture is an installation diagram of a common floor LED screen.

　　floor led screen

　　floor led screen

　　What are features and advantages of LED Floor Display?

　　Flexible & Fast Installation

　　Our led dance floor screen is light-weight design with only 9kg/pc. Slim aluminum die-casting cabinet 500〜500mm and 500〜1000mm with 80mm thickness only. Seamless splicing is working for perfect and complete picture with our unique led dance floor display. All features makes for easy and fast installation.

　　floor led screen

　　floor led screen

　　Front Maintenance

　　Our led dance floor display employs front maintenance design and solution. It can make fast maintenance and replacement with such design. No need professional technician and device, simple and user-friendly for customers.

　　Clamp the tool [progressive gauge” target=_blank> on the frame after the customer puts on the frame.As can be seen from the new data, fashion sunglasses The market influence is also growing, and the product share is also relatively increasing, which has great potential in the future. https://ymoeyewear.com/

　　Align the top edge of the glasses with the bottom edge of the [progressive gauge” target=_blank> beam, and align the glasses with the [progressive gauge” target=_blank> in the center.

　　Use the near vision chart to mark the distance pupil height and near pupil height respectively.

　　Accurately measure the distance between the distance pupil height and the near pupil height. Preliminary progressive channel is obtained.

　　Finally, the most suitable progressive channel is selected based on the customer’s selected lenses, frames, age, eye posture, frame height, old glasses and other factors.

　　Channel Selection Considerations

　　How do we choose relatively appropriate channel parameters for consumers after using above-mentioned gadget [Progressive Meter” target=_blank> to quickly and accurately measure the progressive channel?

　　1. Age

　　Assuming that the distance vision is adequately corrected, the older the person (over 55 years old), the more light added under ADD is usually greater than +2.00D. In this case, a long channel can be selected. At this time, it is also necessary to consider whether the customer’s downward rotation ability can meet the selected channel length.

　　2. Eye posture

　　The customer’s eye posture/habit is very important for choosing a channel. If you are used to moving your eyes but not your head, you can choose a long or short channel. If you are used to moving your head but not your eyes, it is recommended to choose a short channel.

　　For regular eye use, when the eyes are used frequently at close range, such as reading, writing, and browsing mobile phones, the near-use area is large enough to facilitate close viewing. The above-mentioned groups are relatively suitable for short channels.

　　3. Frame

　　Calculate the range of channels based on the frame height, pupil height, distance zone, and near zone. In particular, avoid cutting and abrasion of the near zone due to processing, which will result in a small near zone and unclear near vision.

　　4. Previous Channel Date Record

　　If it is not the first time for the customer to wear progressive glasses and he is used to the old glasses channel, the channel can refer to the old glasses when choosing new glasses to ensure the comfort of the new glasses for near use.

　　Above briefly shared a practical tool [Progressive Measurement” target=_blank> that I saw during the Shanghai exhibition. It can effectively help us quickly and accurately measure the progressive channel and other wearing parameters (such as pupil distance, pupil height, lens eye distance, mirror angle, etc.) when fitting progressive glasses. Good tools can help us better serve customers and improve the professionalism and satisfaction of our services.

　　”Knowledge gained from books is always shallow”, and the continuous accumulation of success/failure cases is the source of our confidence in fitting progressive glasses. After completing the quick and accurate measurement, the selection of channels also needs to consider factors such as lenses, frames, age, eye habits, and old glasses, and flexibly select according to actual conditions.

　　When choosing an Android tablet, battery life is a crucial consideration. A longer battery life ensures that the device can handle prolonged use, whether for work, entertainment, or gaming. Understanding the factors that influence battery performance can help you make an informed decision and optimize your tablet¨s usage. Here¨s a detailed look at the key factors affecting battery life in Android tablets:Down-to-earth right waterproof android tablet In-depth research is the only way to pursue development. https://txsongseng.com

　　1. Battery Capacity

　　MAh Rating: The milliampere-hour (mAh) rating of a tablet¨s battery indicates its capacity. Generally, a higher mAh rating suggests a larger battery, which can potentially offer longer usage times. However, the actual battery life depends on several other factors, not just capacity.

　　2. Screen Size and Resolution

　　Display Power Consumption: Larger screens and higher resolutions require more power. Tablets with high-resolution displays (such as 4K) and larger screens consume more energy to drive the pixels, leading to faster battery drain compared to devices with smaller screens and lower resolutions.

　　3. Processor Efficiency

　　CPU and GPU: The efficiency of the tablet¨s processor (CPU) and graphics processing unit (GPU) plays a significant role in battery life. Newer, more efficient processors often have better power management, which helps extend battery life. Older or less efficient chips may consume more power for the same tasks.

　　4. Operating System and Software

　　System Optimization: The Android operating system and the apps installed on your tablet affect battery performance. Regular software updates and system optimizations can improve power management. Additionally, apps that are not well-optimized may cause increased battery drain due to excessive background processes or inefficient coding.

　　android tablet wholesalers.jpg

　　5. Brightness and Display Settings

　　Screen Brightness: Higher screen brightness levels use more battery power. Adjusting the screen brightness to a lower, more comfortable level can significantly extend battery life. Many tablets also have adaptive brightness settings that adjust brightness based on ambient lighting, which helps save power.

　　6. Connectivity Features

　　Wireless Connections: Features such as Wi-Fi, Bluetooth, and cellular connections can impact battery life. Keeping these connections active when not needed can drain the battery more quickly. Using power-saving modes or turning off unnecessary connectivity features can help conserve battery.

　　7. Battery Health and Age

　　Wear and Tear: Over time, the battery¨s performance may degrade due to wear and tear. Battery health can be affected by factors such as the number of charge cycles and exposure to extreme temperatures. Older batteries generally have reduced capacity and shorter battery life.

　　8. Usage Patterns

　　Active vs. Standby Time: How you use your tablet affects its battery life. Intensive activities like gaming, streaming high-definition videos, or running multiple apps simultaneously will drain the battery faster. In contrast, light usage such as reading or browsing the web may result in longer battery life.

　　Battery life in Android tablets is influenced by a variety of factors, including battery capacity, screen size, processor efficiency, and usage patterns. By understanding these elements, you can make more informed decisions when choosing a tablet and adopt practices to optimize battery performance. Whether you¨re looking for a device with long-lasting battery life or seeking ways to improve your current tablet¨s endurance, considering these factors will help you get the most out of your Android tablet.

　　When customizing hang tags for clothing, one of the key considerations is the type of rope used to attach the tag to the product. As a manufacturer, Zhongxin Garment Accessories offers a wide variety of ropes for hang tags, ensuring that your branding and design needs are met with both style and durability.from China hang tag supplier From the reference value, it can also bring a lot of inspiration to other industries. https://zxgarmentaccessories.com/

　　custom hang tag ropes

　　Types of Ropes for Hang Tags

　　1.Cotton Rope Cotton rope is one of the most popular options due to its natural, eco-friendly appeal. It¨s soft, durable, and offers a rustic look, making it ideal for brands that want to convey sustainability or a vintage aesthetic. Cotton ropes can also be dyed to match your brand colors, providing versatility in design.

　　2.Polyester Rope Polyester rope is known for its strength and durability. It¨s resistant to wear and tear, making it a great choice for high-end fashion items or products that require a robust tag. Polyester ropes are available in a wide range of colors and thicknesses, allowing you to create a more premium look for your hang tags.

　　3.Nylon Rope Nylon ropes are durable and water-resistant, making them perfect for outdoor or activewear brands. They¨re also strong and flexible, ensuring that your hang tags stay securely attached to your product, even under rough handling. Like polyester, nylon ropes can be customized in various colors and styles.

　　4.Twine or Jute Rope Twine or jute is a natural fiber rope that gives a more rustic or handmade feel. This type of rope is often used by eco-friendly or artisanal brands. It¨s an excellent option for businesses that want to promote sustainability while giving their products a unique and natural look.

　　5.Elastic Rope Elastic ropes are often used for hang tags on products that need flexibility, such as shoes, accessories, or sportswear. These ropes can stretch and return to their original length, making them functional and practical for tags that might be removed and reapplied frequently.

　　When customizing a makeup brush set, you need to pay attention to the following aspects to ensure that the final product meets personal needs and has high quality:In some cases, professional makeup brush The advantages will become more and more obvious, and it will be able to develop indomitable after market tests. https://lsmakeupbrush.com

　　1. Brush material

　　Material selection: The material of the brush bristles directly affects the touch and effect of makeup. Common brush bristle materials include nylon, animal hair (such as mink, wool, etc.) and synthetic fiber. Animal hair is usually soft and has a strong ability to absorb powder, which is suitable for powdered cosmetics; nylon brushes are more suitable for liquid and paste cosmetics; synthetic fiber brushes are suitable for a variety of cosmetics and are easy to clean. Choose the right material according to your skin type, cosmetic type and preference.

　　Quality considerations: Make sure the bristles are soft, smooth, non-irritating, and not easy to shed. High-quality bristles can better protect the skin and enhance the sophistication of makeup.

　　2. Brush handle design

　　Material selection: The brush handle is usually made of wood, metal and plastic. Wooden handles are comfortable to touch, metal handles are durable, and plastic handles are light and portable. Choose the right material according to personal preferences and usage scenarios.

　　Design considerations: The design of the brush handle should be ergonomic and easy to hold and operate. At the same time, pay attention to whether the connection between the brush handle and the bristles is firm to avoid loosening or falling off during use.

　　Custom Logo Travel Cosmetic Brush Set 5 Pieces Pink Flower Patterned

　　3. Brush type

　　Diversified needs: Customize brushes of different shapes and sizes according to personal makeup habits and needs. For example, foundation brushes, loose powder brushes, blush brushes, eye shadow brushes, concealer brushes, etc. are all commonly used brush types. Make sure that the kit contains commonly used brush types to meet daily makeup needs.

　　Professional use: If there are special needs, such as professional makeup artists or shooting needs, you can consider customizing more professional brush types, such as highlight brushes, nose shadow brushes, contouring brushes, etc.

　　4. Cleaning and maintenance

　　Easy to clean: Choose a brush material and design that is easy to clean to keep the brush clean and hygienic during use. At the same time, understand and master the correct cleaning and maintenance methods to extend the life of the brush.

　　Maintenance tools: Consider whether matching cleaning tools are needed, such as cleaning fluid, cleaning pads, etc., to better maintain the brush.

　　5. Customization service

　　Brand selection: Choose a brand with good reputation and good credibility for customization to ensure the quality and safety of the brushes. You can make a choice by reading user reviews and understanding the brand background.

　　Communication needs: Fully communicate personal needs and preferences with the customization service provider, including bristle material, brush handle design, brush type, etc. Make sure that the service provider can accurately understand and meet your needs.

　　Custom Logo Travel Cosmetic Brush Set 5 Pieces Pink Flower Patterned

　　6. Budget considerations

　　Reasonable budget: Choose a suitable customized set according to your personal budget. Be careful not to pursue high prices too much, but to choose products with high cost performance. You can compare between multiple brands and service providers and choose a customized solution with high cost performance.

　　In summary, when customizing a makeup brush set, you need to pay attention to the bristle material, brush handle design, brush type, cleaning and maintenance, customization service, and budget considerations. By comprehensively considering these factors, you can customize a makeup brush set that meets personal needs and has high quality.

　　What do several common ADAS functions do?Therefore, this is the choice car camera manufacturer The reason, there is no denying its positive impact. https://szdfpls.com

　　1 LKA (lane keeping assist)

　　LKA can help drivers keep their vehicles in lanes and reduce the risk of lane departure accidents caused by driver negligence or fatigue.

　　The LKA system achieves its functions by using cameras, sensors and control systems. The camera is usually installed at the front of the vehicle to capture the lane line in front of the vehicle. The sensor is responsible for monitoring the driving status and direction of the vehicle, including steering angle, vehicle speed, etc.

　　When the vehicle approaches the lane line during driving, the LKA system detects the position and shape of the lane line and makes a judgment based on the driving status and direction of the vehicle. If the system believes that the vehicle is about to deviate from the lane, it will help the driver guide the vehicle back to the normal lane by controlling the steering system.

　　2 ACC (adaptive cruise control)

　　The ACC system uses on-board sensors, including radar, laser radar, etc., to detect the vehicles and obstacles in front of the vehicle during driving, as well as the position and speed of the vehicle. The system can monitor the distance and speed of the vehicles and obstacles in front in real time, and automatically adjust the speed and driving trajectory according to the speed and driving status of the vehicle to maintain a safe distance from the vehicle in front.

　　Compared with traditional cruise control systems, adaptive cruise systems are more intelligent and flexible. Traditional cruise control systems can only drive at a preset speed and trajectory, while adaptive cruise systems can automatically adjust the speed and trajectory according to the actual situation of the vehicle and obstacles in front to maintain a safe distance.

　　In addition, the adaptive cruise system can also automatically adjust the vehicle¨s speed and trajectory according to the speed and driving status of the vehicle and obstacles in front to maintain the relative position with the vehicle in front. This automatic adjustment function can help drivers drive the vehicle more easily while improving driving comfort and safety.

　　3 FCW (forward collision warning)

　　The FCW system uses on-board sensors, including radar, cameras, etc., to detect the distance and relative speed between the obstacle in front of the vehicle and the vehicle. The system monitors the situation in front of the vehicle in real time. When a collision risk is detected, it will issue a warning to remind the driver to take timely measures.

　　The warning methods of the FCW system usually include sound warnings, vibration seats or steering wheels, etc. The level and method of the warning will vary depending on the size and specific circumstances of the collision risk. If the driver does not take timely measures, the FCW system may also automatically intervene in the vehicle¨s braking system to avoid or mitigate the collision.

　　Collision prevention systems are usually combined with other driver assistance technologies such as lane departure warning systems and adaptive cruise control systems to provide drivers with more comprehensive and reliable driving safety protection.

　　4 AEB (advanced/automatic emergency braking)

　　The implementation of the AEB system function requires the cooperation of multiple sensors and controllers. The sensor in front of the vehicle (such as radar, camera or laser) detects obstacles in front. If there is a risk of collision based on speed and distance analysis, the system will warn the driver through warning lights, alarm sounds, etc. If the driver does not brake after the warning, or the system determines that the driver cannot brake in time after sensing the signal, the AEB system will actively intervene and brake when the threshold is exceeded.

　　5 IPA (intelligent parking assist)

　　IPA integrates sensors, cameras and computer algorithms to realize functions such as automatic parking space identification and automatic parking.

　　In actual use, the driver only needs to press the start button of IPA intelligent parking assist, and the system will automatically detect the surrounding environment and find a suitable parking space. Once a suitable parking space is found, the system automatically calculates the best parking trajectory and controls the vehicle to complete automatic parking. The whole process does not require manual operation by the driver.

　　6 BSD (blind spot detection)

　　BSD mainly detects the blind spot range of the rearview mirror through two millimeter-wave radars equipped on the rear of the vehicle. When other road users are detected in the blind spot, the driver is warned to assist driving or changing lanes.

　　7 DFM (driver fatigue monitoring)

　　DFM aims to monitor the driver¨s physiological state and driving behavior, reminding the driver to rest in time when fatigued, so as to ensure driving safety.

　　The DFM system monitors the driver¨s physiological state in real time through various sensors, such as eye closure, head position, heart rate, etc. These data can provide clues about whether the driver is fatigued. For example, when the driver¨s eyes are closed more or the head position is not correct, this may indicate that the driver is in a state of fatigue. In addition, the DFM system also monitors the driver¨s behavior patterns, such as driving speed, braking frequency, etc. These behavior patterns can also reflect the driver¨s fatigue level. For example, when the driver slows down or brakes more frequently, this may indicate that the driver is tired.

　　The DFM system uses specific algorithms and models to comprehensively analyze the driver¨s physiological and behavioral characteristics to assess the driver¨s fatigue level. These algorithms and models are usually based on machine learning and artificial intelligence technologies, and can determine whether the driver is in a state of fatigue based on the driver¨s characteristic data.

　　8 NV (night vision)

　　NV can detect obstacles and pedestrians at a farther distance than ordinary visible light, which is particularly useful in night and low-light environments. By identifying these obstacles and pedestrians, the NV night vision function can provide drivers with additional warnings, allowing them to react in advance and avoid potential dangers.

　　NV night vision can also be combined with other ADAS technologies, such as automatic emergency braking and adaptive cruise control. When the NV night vision system detects potential dangers, it can trigger these higher-level safety systems to automatically take evasive or braking measures, thereby further enhancing driving safety.

　　However, NV performance is affected by many factors such as light conditions, ambient temperature, and equipment quality. Therefore, when using NVD, it is necessary to make appropriate adjustments and use it according to actual conditions.

　　In the rapidly evolving world of personal hydration, intelligent metal water bottles have become a game-changer. Combining technology with practicality, these smart water bottles offer features that go beyond mere storage. Leading the charge in this innovation is Ervan, a renowned vacuum flask manufacturer known for their high-quality and durable products.Without exception, Insulated stainless steel mug Our customers are willing to purchase their products, because high quality is the concept of their products. https://www.ervanflask.com/

　　What is an Intelligent Metal Water Bottle?

　　An intelligent metal water bottle is equipped with technology to enhance the user¨s drinking experience. Features can include temperature indicators, hydration reminders, and even integration with mobile apps to track water intake. These bottles are designed to keep beverages at the desired temperature for extended periods, thanks to advanced insulation techniques.

　　intelligent metal water bottle

　　Key Features of Ervan’s Intelligent Metal Water Bottles

　　Temperature Control: Ervan¨s intelligent bottles can keep liquids hot or cold for up to 24 hours. The temperature display on the bottle cap lets users know the exact temperature of their beverage.

　　Hydration Reminders: These smart bottles remind users to drink water at regular intervals, promoting better hydration habits.

　　Durable Construction: Made from high-grade stainless steel, Ervan’s bottles are built to last. The vacuum insulation ensures maximum thermal performance.

　　App Integration: Some models come with Bluetooth connectivity, allowing users to sync the bottle with a smartphone app to monitor their daily water intake.

　　Benefits of Using Ervan’s Intelligent Metal Water Bottles

　　Health and Hydration: Staying hydrated is crucial for overall health. The reminder feature helps users maintain adequate hydration levels throughout the day.

　　Eco-Friendly: By using a reusable metal bottle, users reduce their reliance on single-use plastic bottles, contributing to environmental conservation.

　　Convenience: The temperature control feature ensures that beverages are always at the perfect temperature, whether it¨s a hot coffee in the morning or a cold drink after a workout.

　　Durability: Ervan’s bottles are designed to withstand daily use and harsh conditions, making them a reliable companion for any activity.

　　intelligent metal water bottle

　　Why Choose Ervan as Your Vacuum Flask Manufacturer?

　　Ervan has a long-standing reputation for manufacturing high-quality vacuum flasks. Their commitment to innovation and customer satisfaction sets them apart in the market. Here¨s why Ervan is a top choice:

　　Quality Assurance: Every product goes through rigorous testing to ensure it meets high standards.

　　Innovative Designs: Ervan constantly updates their product lines with the latest technological advancements.

　　Customer Support: Excellent after-sales service ensures that any issues are promptly addressed.

　　Sustainability: Ervan is committed to producing eco-friendly products that help reduce the environmental footprint.

　　Conclusion

　　The intelligent metal water bottle is more than just a trend; it represents the future of personal hydration. With Ervan leading the way, these smart bottles offer unparalleled convenience, health benefits, and sustainability. Investing in an Ervan intelligent metal water bottle means choosing quality, innovation, and a greener future.

　　Recently, Keeppower has launched several new Type-C rechargeable batteries.Under people’s attention keeppower battery Finally grow into what people need, born for the market and come for the demand. https://www.keeppower.com

　　Compared to traditional batteries, Type-C rechargeable batteries are more economical and environmentally friendly, cycle life can reach to 300-500 times.

　　The Type-C interface provides convenience for both indoor and outdoor scenario; the gold-plated copper button top and high-quality battery shell protect the battery from scratches and corrosion; additionally, the built-in protection circuit prevents overcharging, over-discharging, and short-circuiting, ensuring high performance and safety.

　　If you are interested in our products or with customization needs, we offer OEM service as well.

　　Before buying the AULA 87-key mechanical keyboard, you can do the following homework:If you want to make a big difference in the market, aula gaming keyboard It is necessary to intensify the upgrading of products on the original basis in order to meet the consumption needs of consumers. https://www.aulastar.com/

　　What homework should I do before buying an AULA 87-key mechanical keyboard?

　　1. Understand the Wolf Spider brand: AULA is a well-known electronic peripheral brand. Understand its brand background, reputation, product quality and other information.

　　2. Study the features of the AULA 87-key mechanical keyboard: Understand the technical parameters, special features, design style, etc. of this keyboard to determine whether it meets your needs and personal preferences.

　　3. Read user reviews and comments: Find user reviews and comments on the web to learn about other users’ experience and comments on the AULA 87-key mechanical keyboard so as to evaluate its performance and reliability.

　　What homework should I do before buying an AULA 87-key mechanical keyboard?

　　AULA F87 Gasket Mechanical Keyboard

　　4. Compare prices and value for money: Compare prices offered by different sales channels and retailers, while considering the performance, quality and features of the keyboard to determine the most cost-effective purchase option.

　　5. Understand after-sales service: Check the after-sales service policy of the AULA brand to understand its return, exchange, repair, warranty and other related information so that you can get timely support and service when needed.

　　6. Consider personal needs: According to your usage habits and needs, determine whether you need specific functions, such as backlight, programmable keys, waterproof design, etc., so as to choose the AULA 87-key mechanical keyboard style that best suits you.

　　7. Budget planning: Determine the price range for purchasing the AULA 87-key mechanical keyboard based on your own budget so that you can arrange your funds reasonably when purchasing.

　　Please note that the above are just some common homework before purchasing the AULA 87-key mechanical keyboard. The specific purchase decision still needs to be made based on personal needs and preferences.

　　Anti-loosening nut is a nut, which is a part that is screwed together with a bolt or a screw for tightening. It is an original part required by all production and processing equipment. Anti-loosening non standard nut is a part that tightly connects mechanical equipment together. With the help of the inner thread, anti-loosening nuts and screws of the same specifications can be connected together. The following is a detailed introduction to several methods of preventing anti-loosening nuts from slipping.consequently Non standard hardware factory I also got a lot of attention and wanted to join the ranks. https://jieruifasteners.com/

　　1. Anti-loosening of equipment

　　It is to use the locking nut stopper to directly limit the relative rotation of the locking nut pair. For example, the use of tooth pins, serial wires and stop washers. Because the locking nut stopper does not have a pre-tightening force, the anti-loosening stopper can only work when the locking nut is loose and returned to the stop position. Therefore, the locking nut method does not actually prevent loosening but prevents falling.

　　2. Riveting and anti-loosening

　　After tightening, use punching, welding, bonding and other methods to make the locking nut pair lose the performance of the kinematic pair and the connection becomes an irremovable connection. The disadvantage of this method is that the bolt rod can only be used once, and it is very difficult to disassemble, and the bolt pair needs to be damaged before it can be disassembled.

　　3. Friction anti-loosening

　　It is the most widely used anti-loosening method. This method forms a positive pressure between the locking nut pairs that does not change with the external force, so as to form a friction force that can prevent the relative rotation of the locking nut pairs. This positive pressure can be achieved by axially or simultaneously pressing the locking nut pairs in two directions. For example, elastic washers, double nuts, self-locking nuts and insert locking nuts are used.

　　4. Structural anti-loosening

　　It is to apply the locking nut pair’s own structure, that is, the Tang’s locking nut anti-loosening method.

　　5. Punching edge anti-loosening

　　After the nut is tightened, the thread is destroyed by punching the end of the thread; bonding anti-loosening generally uses anaerobic adhesive to apply to the thread screw surface. After tightening the anti-loosening nut, the adhesive can solidify by itself, and the actual anti-loosening effect is better. The disadvantage of this method is that the bolt rod can only be used once, and it is very difficult to disassemble, and the bolt pair needs to be destroyed before it can be disassembled.