悬丝静电计 fiber electrometer ; filament electrometer ; electrometer ; string

石英丝静电计 quartz fiber electrometer ; electrometer quartz-fiber

弦丝电位计 string potentiometer ; Space Age String Potentiometer

单丝静电计 unifilar electrometer ; unifilar ; electrometer

灯丝电位计 filament potentiometer

热丝电流计 electrothermal meter

弦丝电流计 string galvanometer

弦丝静电计 string electrometer

电阻丝应变计 resistance wire strain gauge