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

一种铰接的阀，只容许流体单向流动，关闭时发出卡嗒声。

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

一种铰接的阀，只容许流体单向流动，关闭时发出卡嗒声。

youdao