Accumulated dirt and sludge can be removed by "blowing down" through the drain in the bottom of trap.

通过疏水阀底部的排放阀可以清除累积的污垢和淤泥。

youdao

Accumulated dirt and sludge can be removed by "blowing down" through the drain in the bottom of trap.

通过疏水阀底部的排放阀可以清除累积的污垢和淤泥。

youdao