一种铰接的阀，只容许流体单向流动，关闭时发出卡嗒声。

A hinged valve that permits fluids to flow in only one direction and clacks when the valve closes.

youdao

一种铰接的阀，只容许流体单向流动，关闭时发出卡嗒声。

A hinged valve that permits fluids to flow in only one direction and clacks when the valve closes.

youdao