升降臂 meaning in English
lifting arm
Examples
- Safety of earth - moving machinery - requirements for lift arm support devices
运土机械的安全性.第11部分:升降臂支撑装置的要求 - 18 use of pulleys , hoist arms , or other devices to hoist material is prohibited , unless the scaffold is guyed or braced to a permanent structure to prevent tipping or has been designed to accommodate these lifting devices
禁止用滑轮、升降臂或其它设备来提升材料，除非脚手架被拉索或拉条固定在一个永久性性结构物上或者脚手架的设计允许使用这些提升设备。