交流基准电压测量装置
alternating-current reference-voltage measuring unit
电流电压测量
current and voltage measurement
钢板地电流测量装置
steel plate ground current testing apparatus
发电机交流电压测定
generator ac voltage metering
交流电压电磁继电器
AC voltage electromagnetic relay
高压电流电压互感器
high voltage current transformer & potential transformer
漏电电流装置
devices of leakage current
直流电流测量
DC current measurement
direct current measurement
直流电流测量仪
measuring instrument for direct current
DC current measuring instrument
直流电流测量异常
abnormal measurement value of DC current
直流电流-电压特性
DC current-voltage characteristics
专用基准电压电路
specific standard voltage circuit