饮用水管道中的流量计向控制系统传送信息，控制系统控制泵的速度以控制比率。
A flow meter in the potable water line feeds information to the control system which controls the pump speed to control ratio.
饮用水管道中的流量计向控制系统传送信息，控制系统控制泵的速度以控制比率。
A flow meter in the potable water line feeds information to the control system which controls the pump speed to control ratio.
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