... filament cuurent 灯丝电流 filament electrometer 悬丝静电计 filled band 添补地区 ...
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差式静电计 electrometer; differential 悬丝静电计；弦线静电计 electrometer; fiber; string electrometer 金箔静电计 electrometer; gold leaf ..
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象限静电计 electrometer; quadrant 弦线静电计；悬丝静电计 electrometer; string; fiber electrometer 扭转静电计 electrometer; torsion ..
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