multi-frequeny channel ground detector
multi crystal thermistor,多昌热敏电阻器 multi-frequeny channel ground detector,多频道地电仪 multi-runctioninstrument,多功能(测量)仪表 ..
frequeny channel ground detector
ground meteorological detector 地面气象探测器 frequeny channel ground detector 多频道地电仪 voltmeter type ground detector 伏特计式检漏器 ; 伏特计式通地指示器 ..