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。
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。
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