(220-210)/220X100%=4.5%
结果5级
某250V量程电压表,预测定真值为220V电压,示值为210V,试确定其精度等级
某250V量程电压表,预测定真值为220V电压,示值为210V,试确定其精度等级
物理人气:606 ℃时间:2020-02-05 06:23:14
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