Current is the rate of flow of electric charge passing a point.

电流是电荷流过—个点的速率。

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A Balancing Valve is used to regulate and measure the rate of flow of water.

平衡阀一般用来控制和调节介质流量。

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A Balancing Valve is used to regulate and measure the rate of flow of water.

平衡阀一般用来控制和调节介质流量。

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