表面直流电阻
DC surface contact resistance
表面直流接触电阻
DC surface contact resistance
电子管直流毫伏表
vacuum tube direct current millivoltmeter
高阻抗直流电压表
dc high impedance voltmeter
交直流两用数字电压表
AC-DC digital voltage meter
数字直流电压表
Digital direct current voltage meter
直流电动系仪表
DC Electric Power System Device
直流动圈式方形电表
DC moving coil square instrumert
直流动圈式矩形电表
DC moving coil rectangular instrument
直流动圈式圆形电表
DC moving coil round instrument