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1·Its explosion proof property, over speed and over reel control, prevention of high and low hydraulic pressure, and coordination of braking and hoisting are the key and core points for safety design.

液压提升机的防爆、提升过程中的超速、过卷保护、液压系统的高、低压保护及升降与制动工作协同性是其安全性设计的核心与关键。

2·The invention relates to hoisting, pulling, hauling equipment, in particular to an infinite variable speed hoisting winch.

本发明涉及一种提升牵引、拖运设备，具体为可无级变速的绞车。