[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 ...
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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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短语
差动式检流计
differential type galvanometer
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