Position and adjust dies on anvil of forging machinery using overhead cranes or other hoisting devices and hand tools.
使用桥式起重机或其他起重设备及手工具定位和调整砧锻压机械的压模。
Operate hoisting and lifting devices such as cranes, jacks and tractors to position machinery and parts during the installation, set-up and repair of machinery.
在安装，设置及维修机器过程中，操作起重设备，如起重机，千斤顶和拖拉机来放置机械或部件。
This paper analyzes the stress wave of hoisting steel rope caused by impact and The position and size of maximum impact load have been found in theory.
分析了由于冲击而引起的钢丝绳的应力波动，并从理论上找到了发生最大冲击负荷的部位及大小。
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