Distance between upper ram and lower hoisting block
上压头距下极头距离
Design and Calculation of Horizontal Anchor Block in Easy Hoisting Device
简易起重设备中水平地锚的设计与计算
Hoisting mechanism including electric motor, brake, reduction gear, reel and block and tackle.
起升机构包括电动机，制动器，减速器，卷筒和滑轮组。
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