The insulation resistance of No. 3 generator is too low. Please rectify it.
三号发电机的绝缘电阻太低，请校正。
With direct type wheelhead generator, structure is compact, noise is low , fault is few;
采用直接式磨头电机，结构紧凑，噪音低；故障少；
With direct type wheelhead generator, structure is compact, noise is low , fault is few;
采用直接式磨头电机，结构紧凑，噪音低；故障少；
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