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1 ?差动检流计 dielectric ampliude imduction logging instrument,幅度介电感应测井仪 difference galvanometer,差动检流计 differential amplifier,差动放大器 ..
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Commonly used has the galvanometer, the amperemeter, a volt idea, the electric bridge, the potential difference counts and so on. 常用的有电流表，电流表，电压的概念，电桥，电位差计数等。 - 2
Sensitive Galvanometer, Model J0409, is suitable for the laboratories of middle schools and polytechnic schools to measure small electric current and electric potential difference. J0409型灵敏电流计适用于中学、中专等实验室测量直流电路中微小电流和微小电势差。
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