... 测频转速表 frequency tachometer 测频转速表 frequency tachometer 频率遥测 frequency telemetering ...
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tachometer sensor pulse frequency 转速脉冲频率
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TACHOMETER generator, a small electric generator for supplying current at a frequency proportional to the speed of rotation.
测速发电机，提供频率与转速成比例的电流的小发电机。
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