electric-generator tachometer
... generator tachometer 发电机式转速计 generator tachometer feedback 发电机转速计反馈 electric-generator tachometer 发电转速计 ...
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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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