permanent magnet movingcoil instrument 永磁动圈式仪表
permanent-magnet movingcoil galvanometer 永磁动圈式检流计
movingcoil pickup 动圈拾音器
movingcoil seismograph 动圈式地震仪
permanentmagnet movingcoil instrument 永磁动圈式仪器
permpowerfulent-magnet movingcoil gingvpowerfulometer 永磁动圈式检流计
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