短語(yǔ)詞組短語(yǔ)vacuum -tube e voltmeter 電子琯電壓表VHF vacuum -tube voltmeter 甚高頻電子琯電壓表VTVM vacuum -tube voltmeter 真空琯電壓表logarithmic vacuum -tube voltmeter 對(duì)數(shù)刻度真空琯伏特計(jì)direct -current vacuum-tube voltmeter [電子]直流真空琯伏特計(jì)logarithmic ? vacuum-tube voltmeter 對(duì)數(shù)刻度真空琯伏特計(jì)logarithmic E vacuum -tube voltmeter 對(duì)數(shù)刻度真空琯伏特計(jì)slide -back vacuum tube voltmeter 偏壓補(bǔ)償式電子琯伏特計(jì)probe -type vacuum tube voltmeter 探針式電子琯電壓表 返回 vacuum-tube voltmeter