[电] differential galvanometer

... differential gain control 差动增益控制 differential galvanometer 差动检流计 differential gap 中性区，微差隙，不可调间隙，偏差间隙 ...

 difference galvanometer

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 ..