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。

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It is composed of open type engine body, hydraulic power cylinder, upper pressure head, and lower type box. The type box can be collocated with manual four-positions renewal.

有开式机身、液压动力缸、上压头、下字盒等组成。下字盒可配手动四位根据用户要求更换。

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