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图25是一个平均值输出，有效值刻度的交流电压表头放大电路。
The circuit shown in Figure 25 is the heart of an average reading, rms calibrated AC voltmeter.
youdao
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图25是一个平均值输出，有效值刻度的交流电压表头放大电路。
The circuit shown in Figure 25 is the heart of an average reading, rms calibrated AC voltmeter.
youdao