The use of hydraulic cylinder in hydraulic elevator, the part usually has five parts: piston and piston rod, cylinder and cylinder head, buffer device, sealing device and exhaust device.
液压升降机中使用的液压油缸，其组成部分通常有五部分：活塞和活塞杆、缸筒和缸盖、缓冲装置、密封装置、排气装置。
As the buffer action of the elastic of the tension spring of the elastic of the fishing rod, the hook fish is difficult to escape.
由于拉簧的弹性和鱼杆本身弹性的缓冲作用，钩住的鱼不易逃脱。
As the buffer action of the elastic of the tension spring of the elastic of the fishing rod, the hook fish is difficult to escape.
由于拉簧的弹性和鱼杆本身弹性的缓冲作用，钩住的鱼不易逃脱。
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