目前，世界上过半的新升降机是在中国装置的。
Currently, more than half of the world's new elevators are being installed in China.
1857年3月23日，美国纽约一家楼高五层的商店安装了首部使用奥的斯安全装置的客运升降机。
In March 23, 1857, the United States of New York a five storey shop installed the first use of Otis safety device for passenger lifts.
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。
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.
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