... instruments 接地电阻测量仪 Earthing resistance tester真空管电压表 Vacuum tube voltmeter 电动秒表 Electric second-meter ..
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electric second meter 电秒表
electric railway second meter 电秒表
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The invention discloses a device for detecting an electric energy meter error under a harmonic condition by adopting a watt-second method, and a detecting method.
本发明公开了一种采用瓦秒法检测谐波条件下电能表误差的装置及检测方法。
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