... 磁转速计；磁转速表 magnetic tachometer 磁转速计；磁转速表 magnetic tachometer 磁带读值 magnetic tape readout ...
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短语
磁力转速计
Magnetic speedometer
磁电式转速计
[电]
magnetoelectric tachometer
磁性转速计
Magnetic speedometer
磁感应式转速计
magnetic drag tachometer
转杯磁感风速计
cup-generator anemometer
电磁感应式转速计
electromagnetic induction speed indicator