按下水泵“开”按钮，泵即运转；然后打开泵的吸入阀。

Press the "Start" button, the pump running, then open the suction valve of the pump.

youdao

按下水泵“开”按钮，泵即运转；然后打开泵的吸入阀。

Press the "Start" button, the pump running, then open the suction valve of the pump.

youdao