A Product structural features: sliding support means beginning to support the weight limit (or boot) displacement, vibration control (Akira) move to reduce thrust and other effects, and has a simple structure, large capacity, adaptability, long life, low cost advantages. In addition, there will be noise mufflers, protective equipment, reduce the role of direct friction device. 1. low coefficient of friction 摖: μ≤0.1; 2. Self-lubricating: Mount 摖 no oiling or vice between the lubricant and reduce the maintenance workload; 3. Adaptability: adapt farming under various environmental status, performance stable and reliable; 4. Resistance to wear: Under normal circumstances, the service life of more than 15 years. Cold insulation type and seat cushion uses heat and cold layer, effectively solve the heat loss and cold pipes