【单选题】【消耗次数:1】
电磁系仪表的转动力矩由被测量的( )决定。
平均值
峰值
有效值
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相关题目
【单选题】 电动系仪表的转动力矩由被测量的( )决定。
①  平均值
②  峰值
③  有效值
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