Used in conjunction with a Signal Level Meter, the gain or loss of any system component can be quickly measured.
与信号电平表联合使用，任何系统部件的收益或损失都可以进行快速测量。
As the frequency of the AC component increases, the DC meter response decreases, until at some frequency only the average input voltage will be displayed.
当交流分量的频率增加时，直流仪表的响应就会变得不够快，直到在某一频率时，仪表只能显示出输入电压的平均值。
B Flow meter provides volume of liquid component going into a mixing tank.
流量计提供加入一个混合罐的液体成分的体积。
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