The utility model discloses a negative pressure generator used by a water pump suction pipe without a bottom valve.

本实用新型公开了一种无底阀水泵吸水管用负压发生器。

youdao

The utility model discloses a negative pressure generator used by a water pump suction pipe without a bottom valve.

本实用新型公开了一种无底阀水泵吸水管用负压发生器。

youdao