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。

youdao

A type of pumper that uses a hydraulic power source, a cylinder, and a piston attached to the polished rod.

利用液压动力源、液压缸和固定于光杆的活塞进行抽油的一种抽油机。

youdao

Apply to reciprocating motion of hydraulic cylinder piston rod sealed device can also be used to cover the static flange seal.

适用于液压缸活塞杆往复运动用密封装置，也可用于法兰端盖的静密封装置。

youdao