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Vehicle GPS Trackers GPS311 Tracking Devices For Vehicle Location Trackers free tracking platform Key Specifications/Special Features: This tracker is a newly product based on the GSM/GPRS network and GPS satellite positioning system, which set multiple functions of security, positioning, monitoring surveillance, emergency alarms and tracking in its entiret. Function description: 1. Web based online tracking at our server 2. View map on cell phone, PDA, view target current location on map on the cellphone and PDA with the maps link in the message from tracker 3. Get location in real street/address name, send address + password to tracker, tracker will reply detailed street address, e. G. No. 113, Nantou guankou 2ND Rd, Nanshan, Shenzhen, China. 4. Location based service function, get detailed position via GSM network when the tracker in the place where is no GPS signal, with direction for real time track on Google map 5. Location Based Service, if the target you are inquiring enters into underground parking lot or other GPS blind area, the tracker will inform you the location via GSM network 6. Remote engine-stop and resume 7. Tracking function by timing and frequency 8. Authorized number added and deleted function 9. Real time Web server tracking and APP 10. Geofence: Set-up a geofence for the unit to restrict its movements within a district 11. The unit will send the message to the authorized numbers when it breaches the district 12. Waterproof IP66 13. ACC alarm 14. Movement alert 15. Over speed alarm: You can make the inspected target run according to fixed speed, it alarms when speed is exceeded 16. Power supply disconnection alarm 17. Low battery alarm function 18. Check the vehicle status 19. Set up ACC alarm, Sensor alarm by remote controller Quiver/sensor alarm Optional 24V relay for 24V vehicle Siren Extra remote control Applying directions: Vehicle fleet/logistics/vehicle rental Product Notes: Great for private use, company car or rental fleet management Comes with internal GSM and GPS antenna for excellent reception Comes with detailed instructions on how to work with GPRS enabled SIM and setup internet monitoring , so constant tracking information can be displayed on a detailed map Standard Package Include: 1 x tracker 1 x user manual 1 x packing box 1 x harness (cables) 1 x 12V relay 1 x Remote control and remote control Antenna (Only for GPS311C) Warranty 1. One year warranty is provided for all models. 2. All products have been strictly Quality Checked in house before packing. 3. All products have been well packed before shipping. OEM&ODM Service 1.Customize logo and brand print on the device or box 2.Offer firmware modification service 3.Customize design in bulk order Contact Details Shenzhen Coban Electronics Co., Ltd ( GPS Tracker Manufacturer)

Minimum Order: 100

GPS Tracking System for Avl Fleet Manage Turn off Engine GPS311 GPS Tracking Device car GPS tracker Key Specifications/Special Features: This tracker is a newly product based on the GSM/GPRS network and GPS satellite positioning system, which set multiple functions of security, positioning, monitoring surveillance, emergency alarms and tracking in its entiret. Function description: 1. Web based online tracking at our server 2. View map on cell phone, PDA, view target current location on map on the cellphone and PDA with the maps link in the message from tracker 3. Get location in real street/address name, send address + password to tracker, tracker will reply detailed street address, e. G. No. 113, Nantou guankou 2ND Rd, Nanshan, Shenzhen, China. 4. Location based service function, get detailed position via GSM network when the tracker in the place where is no GPS signal, with direction for real time track on Google map 5. Location Based Service, if the target you are inquiring enters into underground parking lot or other GPS blind area, the tracker will inform you the location via GSM network 6. Remote engine-stop and resume 7. Tracking function by timing and frequency 8. Authorized number added and deleted function 9. Real time Web server tracking and APP 10. Geofence: Set-up a geofence for the unit to restrict its movements within a district 11. The unit will send the message to the authorized numbers when it breaches the district 12. Waterproof IP66 13. ACC alarm 14. Movement alert 15. Over speed alarm: You can make the inspected target run according to fixed speed, it alarms when speed is exceeded 16. Power supply disconnection alarm 17. Low battery alarm function 18. Check the vehicle status 19. Set up ACC alarm, Sensor alarm by remote controller Quiver/sensor alarm Optional 24V relay for 24V vehicle Siren Extra remote control Applying directions: Vehicle fleet/logistics/vehicle rental Product Notes: Great for private use, company car or rental fleet management Comes with internal GSM and GPS antenna for excellent reception Comes with detailed instructions on how to work with GPRS enabled SIM and setup internet monitoring , so constant tracking information can be displayed on a detailed map Standard Package Include: 1 x tracker 1 x user manual 1 x packing box 1 x harness (cables) 1 x 12V relay 1 x Remote control and remote control Antenna (Only for GPS311C) Warranty 1. One year warranty is provided for all models. 2. All products have been strictly Quality Checked in house before packing. 3. All products have been well packed before shipping. OEM&ODM Service 1.Customize logo and brand print on the device or box 2.Offer firmware modification service 3.Customize design in bulk order Contact Details Shenzhen Coban Electronics Co., Ltd ( GPS Tracker Manufacturer)

Minimum Order: 100

Mini gps Car Tracker GPS Tracking GPS311C remote control vehicle real time with ACC alarm free mobile APP Key Specifications/Special Features: This tracker is a newly product based on the GSM/GPRS network and GPS satellite positioning system, which set multiple functions of security, positioning, monitoring surveillance, emergency alarms and tracking in its entiret. Function description: 1. Web based online tracking at our server 2. View map on cell phone, PDA, view target current location on map on the cellphone and PDA with the maps link in the message from tracker 3. Get location in real street/address name, send address + password to tracker, tracker will reply detailed street address, e. G. No. 113, Nantou guankou 2ND Rd, Nanshan, Shenzhen, China. 4. Location based service function, get detailed position via GSM network when the tracker in the place where is no GPS signal, with direction for real time track on Google map 5. Location Based Service, if the target you are inquiring enters into underground parking lot or other GPS blind area, the tracker will inform you the location via GSM network 6. Remote engine-stop and resume 7. Tracking function by timing and frequency 8. Authorized number added and deleted function 9. Real time Web server tracking and APP 10. Geofence: Set-up a geofence for the unit to restrict its movements within a district 11. The unit will send the message to the authorized numbers when it breaches the district 12. Waterproof IP66 13. ACC alarm 14. Movement alert 15. Over speed alarm: You can make the inspected target run according to fixed speed, it alarms when speed is exceeded 16. Power supply disconnection alarm 17. Low battery alarm function 18. Check the vehicle status 19. Set up ACC alarm, Sensor alarm by remote controller Quiver/sensor alarm Optional 24V relay for 24V vehicle Siren Extra remote control Applying directions: Vehicle fleet/logistics/vehicle rental Product Notes: Great for private use, company car or rental fleet management Comes with internal GSM and GPS antenna for excellent reception Comes with detailed instructions on how to work with GPRS enabled SIM and setup internet monitoring , so constant tracking information can be displayed on a detailed map Standard Package Include: 1 x tracker 1 x user manual 1 x packing box 1 x harness (cables) 1 x 12V relay 1 x Remote control and remote control Antenna (Only for GPS311C) Warranty 1. One year warranty is provided for all models. 2. All products have been strictly Quality Checked in house before packing. 3. All products have been well packed before shipping. OEM&ODM Service 1.Customize logo and brand print on the device or box 2.Offer firmware modification service 3.Customize design in bulk order Contact Details Shenzhen Coban Electronics Co., Ltd ( GPS Tracker Manufacturer)

Minimum Order: 100

Coban GPS Tracking Device GPS311B GPS311C Motorcycle Vehicle Mini Car GPS Tracker remote stop engine TK311 Key Specifications/Special Features: This tracker is a newly product based on the GSM/GPRS network and GPS satellite positioning system, which set multiple functions of security, positioning, monitoring surveillance, emergency alarms and tracking in its entiret. Function description: 1. Web based online tracking at our server 2. View map on cell phone, PDA, view target current location on map on the cellphone and PDA with the maps link in the message from tracker 3. Get location in real street/address name, send address + password to tracker, tracker will reply detailed street address, e. G. No. 113, Nantou guankou 2ND Rd, Nanshan, Shenzhen, China. 4. Location based service function, get detailed position via GSM network when the tracker in the place where is no GPS signal, with direction for real time track on Google map 5. Location Based Service, if the target you are inquiring enters into underground parking lot or other GPS blind area, the tracker will inform you the location via GSM network 6. Remote engine-stop and resume 7. Tracking function by timing and frequency 8. Authorized number added and deleted function 9. Real time Web server tracking and APP 10. Geofence: Set-up a geofence for the unit to restrict its movements within a district 11. The unit will send the message to the authorized numbers when it breaches the district 12. Waterproof IP66 13. ACC alarm 14. Movement alert 15. Over speed alarm: You can make the inspected target run according to fixed speed, it alarms when speed is exceeded 16. Power supply disconnection alarm 17. Low battery alarm function 18. Check the vehicle status 19. Set up ACC alarm, Sensor alarm by remote controller Quiver/sensor alarm Optional 24V relay for 24V vehicle Siren Extra remote control Applying directions: Vehicle fleet/logistics/vehicle rental Product Notes: Great for private use, company car or rental fleet management Comes with internal GSM and GPS antenna for excellent reception Comes with detailed instructions on how to work with GPRS enabled SIM and setup internet monitoring , so constant tracking information can be displayed on a detailed map Standard Package Include: 1 x tracker 1 x user manual 1 x packing box 1 x harness (cables) 1 x 12V relay 1 x Remote control and remote control Antenna (Only for GPS311C) Warranty 1. One year warranty is provided for all models. 2. All products have been strictly Quality Checked in house before packing. 3. All products have been well packed before shipping. OEM&ODM Service 1.Customize logo and brand print on the device or box 2.Offer firmware modification service 3.Customize design in bulk order Contact Details Shenzhen Coban Electronics Co., Ltd ( GPS Tracker Manufacturer)

Minimum Order: 100

　　A gasket is a mechanical seal that fills the space between two or more mating surfaces, generally to prevent leakage from or into the joined objects while under compression. Gaskets allow for “less-than-perfect” mating surfaces on machine parts where they can fill irregularities. 　　Sealers, on the other hand, are substances applied to a gasket to help it fulfill its function more effectively. They can provide additional sealing properties, protect the gasket material, and make the installation process easier. 　　However, whether a sealer needs to be used when installing a gasket depends on several factors. These include the type of gasket, the specific application, and the condition of the mating surfaces. 　　For some types of gaskets, such as pre-formed or composite gaskets, a sealer may not be necessary. These gaskets are designed to work without sealers and adding one might interfere with their function. 　　On the other hand, for flat paper or cork gaskets, using a sealer can be beneficial. A thin layer of sealer can help the gasket adhere to the mating surfaces, fill any minor surface irregularities, and prevent leakage. 　　The specific application also plays a role in determining whether a sealer should be used. In high-pressure or high-temperature environments, a sealer can provide additional security against leaks. 　　Lastly, the condition of the mating surfaces is crucial. If the surfaces are rough or have minor damage, a sealer can help ensure a tight seal. 　　While sealers can be beneficial in certain situations, they are not always necessary when installing a gasket. It’s important to consider the type of gasket, the specific application, and the condition of the mating surfaces before deciding whether to use a sealer.

Minimum Order: 100

This training device includes various types of electrical application circuit units. Through related experiments, you can familiarize with and control the principles electrical principle, develop students' corresponding knowledge and skills, and are suitable for higher vocational, vocational and secondary vocational schools and Assessment of teaching and skills training of related majors in technical schools.

　　Seals are essential components in machinery, serving to prevent leakage of fluids or gases. The selection of the right seal is crucial for the optimal performance and longevity of the machinery. Here are some key points to consider when selecting seals: 　　1. Operating Conditions: The temperature, speed, medium, and pressure under which the seal will operate are critical factors that determine the material and structure of the seal. These data can be obtained from the original equipment manufacturer’s specifications or evaluated based on the actual working environment. 　　2. Direction of Motion: The location of the seal and its direction of motion (whether it is a static or dynamic seal) are important considerations. If it’s a dynamic seal, you need to determine whether it involves reciprocating or rotary motion. The length of the stroke can also influence the structure of the seal. 　　3. Dimensions: Accurate dimensions are vital for ensuring a proper fit and effective sealing. It’s important to measure the inner diameter, outer diameter, and width of the seal accurately. 　　4. Material Compatibility: The seal material should be compatible with the medium it will be in contact with, such as air, water, oil, steam, or chemicals. It should also be compatible with any metal or plastic parts it will contact. 　　5. Environmental Factors: The seal should be able to withstand environmental factors such as exposure to ozone, ultraviolet light, and varying temperatures. For instance, if a seal is to be used outdoors in a cold climate, a material that remains flexible at low temperatures would be necessary. 　　6. Regulatory Compliance: If the seal is to be used in applications such as potable water systems, it must comply with relevant health and safety standards. 　　7. Cost-effectiveness: While it’s important to choose a high-quality seal that meets all technical requirements, cost-effectiveness should also be considered. This involves evaluating not just the initial cost of the seal, but also its expected lifespan and potential maintenance costs. 　　Selecting the right seal involves careful consideration of various factors including operating conditions, motion direction, dimensions, material compatibility, environmental factors, regulatory compliance, and cost- effectiveness. By taking all these factors into account, you can ensure that you choose a seal that will perform effectively and last for a long time.

Minimum Order: 100

item value Feature Adjustable (other) Specific Use Shoe Rack General Use Home Furniture Type Living Room Furniture Mail packing N Application Bathroom, Living Room, Bedroom, Outdoor, Other, Entry Design Style Modern Material Metal Stainless steel Appearance Modern Folded NO P , lace of Origin China Zhejiang Brand Name Product name Shoe Storage Cabinet Application Entry Usage Shoes Container Color Silver Function Home Storage Organization Keywords Shoe Organizer Rack Holder Meterial Matel Steel Advantage High-quality Style Mod , ern-Style OEM/ODM Acceptale

Minimum Order: 2 barrels

　　Oil seal products, often used as spare parts, require long-term storage. The physical and chemical properties of the material from which the oil seal is made may change under the influence of deformation, oxygen, ozone, light, heat, humidity, oil, or solvents, potentially leading to seal failure. Therefore, understanding the key points in storing oil seal products is crucial. 　　The ideal storage temperature for oil seal products is between 10°C and 25°C. Exposure to heat sources and direct sunlight should be avoided. If an oil seal product is taken out of a low-temperature storage state, it should be placed in an environment of 20°C for a while before use. 　　Humidity also plays a significant role in the storage of oil seal products. The relative humidity of the warehouse should not exceed 60%. Conditions that are too humid can lead to condensation and compromise the integrity of the seals. However, conditions that are too dry should also be avoided. 　　In addition to temperature and humidity, other environmental factors can affect the quality of stored oil seals. For instance, exposure to circulating air can cause rubber-made products to deteriorate. Therefore, these products should be stored in well-sealed containers. Moreover, ozone molecules are harmful to many elastomers; hence, storage rooms should avoid using equipment such as high-voltage electrical equipment, electric motors, and mechanical equipment that can generate sparks or static electricity. 　　Proper storage of oil seal products is essential for maintaining their quality and performance. By controlling the storage temperature and humidity and avoiding exposure to harmful environmental factors, the original physical and chemical properties of elastomers can be preserved, thereby ensuring the effectiveness and longevity of oil seals.

Minimum Order: 100

　　The manufacturing of high-quality oil seals is a meticulous process that requires the selection of appropriate materials. The choice of material significantly influences the performance, durability, and overall lifespan of the oil seal. This article explores some of the most commonly used materials in the production of high-quality oil seals. 　　Nitrile Rubber (NBR) 　　Nitrile Rubber, also known as NBR, is one of the most commonly used materials for oil seals. It is a synthetic rubber copolymer of acrylonitrile (ACN) and butadiene. NBR is known for its excellent resistance to petroleum oils, mineral oils, vegetable oils, and many acids. It also exhibits good abrasion resistance and tensile strength. These properties make NBR an ideal choice for applications where the oil seal is exposed to harsh conditions. However, it’s worth noting that NBR’s performance may degrade with exposure to ozone, sunlight, or weather. 　　Fluoroelastomers (FKM) 　　Fluoroelastomers, often referred to by the brand name FKM, are another popular choice for oil seals. FKM is a type of synthetic rubber known for its exceptional resistance to heat, chemicals, and oil. It can withstand temperatures up to 250°C, making it suitable for high-temperature applications. FKM also offers excellent resistance to aging and ozone. However, it’s more expensive than NBR and may not be the best choice for low- temperature applications. 　　Polyacrylate (ACM) 　　Polyacrylate, or ACM, is a class of polymers that are noted for their transparency and resistance to heat and UV radiation. ACM oil seals are particularly effective in operating environments that involve exposure to high temperatures and oils. They offer good resistance to mineral and synthetic oils and are often used in automotive applications for this reason. However, they have poor low-temperature performance and are not suitable for applications involving water or glycol-based brake fluids. 　　Silicone (VMQ) 　　Silicone oil seals (VMQ) are known for their excellent heat resistance and are capable of withstanding temperatures up to 225°C. They also have good cold flexibility and are resistant to ozone and weathering. However, they have poor tensile strength and tear resistance compared to other materials like NBR or FKM. 　　The selection of material for manufacturing high-quality oil seals depends on the specific application requirements. Factors such as operating temperature range, exposure to different types of fluids or chemicals, and mechanical stress all play a role in determining the most suitable material. By understanding these factors and the properties of different materials like NBR, FKM, ACM, and VMQ, manufacturers can produce high-quality oil seals that meet diverse application needs.

Minimum Order: 100

　　The performance and longevity of oil seals are significantly influenced by the surface roughness of the shaft with which they interact. If the shaft surface roughness is too high, exceeding Ra0.9μm, the peaks on the shaft surface will penetrate the oil film and come into contact with the seal lip, resulting in dry friction. This can lead to wear on the lip surface and an increase in oil film thickness beneath the lip, ultimately causing seal failure. 　　Conversely, if the shaft surface roughness is too low, falling below Ra0.12μm, the contact area between the seal lip and the shaft can be absorbed into the recesses on the shaft surface. This can lead to oil being squeezed out from beneath the lip, destroying the oil film and resulting in dry friction that wears down the seal lip. 　　Therefore, maintaining an optimal level of shaft surface roughness is crucial for ensuring effective sealing performance and prolonging the lifespan of oil seals. Generally, a surface roughness of Ra0.2~0.6μm is considered ideal for shafts used in conjunction with oil seals. 　　In addition to surface roughness, other factors such as shaft ovality, eccentricity, and runout also directly impact the sealing performance of oil seals. These factors should be carefully controlled during manufacturing and assembly processes to ensure optimal performance. 　　Understanding and controlling shaft surface roughness is vital for maximizing oil seal performance and longevity. By maintaining an optimal level of roughness and controlling other factors such as ovality, eccentricity, and runout, can significantly enhance the performance and lifespan of their oil seals.

Minimum Order: 100

　　Oil seals also known as rotary shaft seals, are essential components used to prevent the leakage of lubricants and fluids in rotating machinery. They are commonly used in various industries such as automotive, manufacturing, and engineering. The design and structure of oil seals can vary significantly depending on their application. One key distinction lies in the presence or absence of a spring. 　　Functionality 　　Oi , l seals with springs and without springs serve the same fundamental purpose, which is to prevent the leakage of fluids and contaminants. However, the inclusion of a spring in oil seals provides additional benefits. The spring serves as a radial load component, ensuring a constant pressure on the sealing lip against the shaft, thereby enhancing the sealing efficiency. On the other hand, oil seals without springs rely solely on the interference fit between the seal and the shaft to maintain the sealing integrity. 　　Sealing Efficiency 　　The presence of a spring in oil seals significantly improves their sealing efficiency. The spring helps to compensate for any wear or misalignment that may occur between the shaft and the seal over time. It ensures a continuous radial force against the shaft, maintaining a tight seal and preventing fluid leakage. In contrast, oil seals without springs may experience reduced sealing efficiency due to wear or misalignment, leading to potential leaks. 　　Installation and Assembly 　　Oil seals with springs are relatively easier to install and assemble compared to their counterparts without springs. The spring provides a self- adjusting feature, allowing for easier alignment and positioning during installation. The spring also helps to maintain a constant pressure on the sealing lip, ensuring a secure fit. Conversely, oil seals without springs require more precise alignment and careful installation to achieve an effective seal. 　　Applications 　　O , il seals with springs are commonly used in applications where there is a high degree of shaft misalignment or vibration. The spring compensates for any shaft movement, ensuring a constant radial force on the sealing lip. This makes them suitable for use in heavy machinery, automotive engines, and industrial equipment. Oil seals without springs, on the other hand, are used in applications where shaft misalignment and vibration are minimal, such as pumps, compressors, and light-duty machinery. 　　Longevity and Durability 　　Oil seals with springs generally have a longer lifespan and higher durability compared to those without springs. The spring helps to distribute the load evenly on the sealing lip, reducing wear and tear. It also provides additional support and stability to the seal, preventing deformation or damage. Oil seals without springs may experience faster wear and reduced durability, especially in applications with higher shaft misalignment or vibration. 　　Oil seals with springs offer improved sealing efficiency, easier installation, and better performance in applications with shaft misalignment or vibration. On the other hand, oil seals without springs are suitable for applications with minimal misalignment and vibration. Careful consideration of the specific application requirements is essential in selecting the appropriate oil seal type.

Minimum Order: 100

The electronic training device, including the basic electrical experimenter, includes a host and a template unit. The host unit includes various measuring instruments, waveform generators, and power modules; the template unit has eleven templates each containing an eight-digit DIP switch, so the experiment on each template can use this switch to arrange appropriate faults. Let students practice troubleshooting. See Appendix 1 for the relative position of the fault repair switch. The fault switch of each template is factory-based, based on the principle that the circuit works normally. Place the switch in the normal position after troubleshooting.

This training device includes a variety of types of three-phase ac motor and industrial control components, through the relevant Experiment , can be familiar with the operation of the three-phase ac motor features and the use of a variety of industrial control components method, grasp its control principle and control mode, the corresponding knowledge and skills, suits, higher vocational colleges, secondary vocational schools and vocational school related professional teaching and skills training examination.