Are electric cables to portable electrical equipment disconnected from power?
连接移动式电气装置之电线已从电源切离？
Prior to cleaning the light, make sure it has been disconnected form the power supply.
在清洁灯具之前，请一定要关闭电源。
Prior to cleaning the light, make sure it has been disconnected form the power supply.
在清洁灯具之前，请一定要关闭电源。
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