操作人员必须掌握启闭机的结构、性能与操作方法，并有一定的机械知识，以确保机器的正常运转。
Operators must master the structure, performance and operation method of the hoist, and have some mechanical knowledge to ensure the normal operation of the machine.
操作前，对启闭机进行全面检查，各部位润滑情况是否良好，螺栓有无松动。电动启闭时检查电源线路是否接通，开关是否良好。
Before operation, check the hoist thoroughly. Whether the lubrication of each part is good or not, whether the bolt is loose or not. Check whether the power supply line is connected and the switch is good when the electric power is on or off.