mains switch

• 电源开关,馈路开关

mains switch的用法和样例：

例句

1. Turn on the main source switch, and the Control Unit is now put in work.
   打开主电源开关时控制部件将开始工作。
2. The mains switch is located on the rear cover along with the AC inlet, all the other knobs and jacks are on the front.
   电源开关位于后盖一起交流入口，所有其他的旋钮和插孔都在前线。