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1·Start the mains switch of control panel.

打开控制面板电源开关。

2·New water mains switch effect, they are practical, at the end of you!

一款水管开关效果，挺实用的，大家来看看吧！

3·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。

4·One of the audience: Switch off the mains?

有一位听众说：「关掉大门？」