A disk turning on a diametrical axis inside a pipe, used as a throttle valve or damper.

节流阀，减压阀：管道内沿直径中心轴线上的圆片状旋钮，用作节流阀门或阀门。

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A disk turning on a diametrical axis inside a pipe, used as a throttle valve or damper.

节流阀，减压阀：管道内沿直径中心轴线上的圆片状旋钮，用作节流阀门或阀门。

youdao