magnetic electric tachometer
... magnetic earphone 电磁式耳机 magnetic electric tachometer 磁电测速仪 magnetic electron lens 磁电子透镜 ...
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短语
磁电工速度测量仪
magnetoelectric velocity measuring instrument
地磁电动测速仪
geomagnetic electrokinetoghraph
磁电式速度测量仪
magnetoelectric velocity measuring instrument