In order to ensure the installation precision of steel structure, the overall transformation of the truss is calculated and monitored during the hoisting.
为了保证钢结构安装精度，在吊装过程中，对桁架的整体变形进行了计算和监测。
2
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。
3
The structure of fan is compact, installation is convenient, but direct with wind canister connection, can hoisting.