What is the normal insulation class of the motor you receive ?
你所维修过的电机的绝缘等级一般是多少？
NOTE 2 Failure of basic insulation is not considered likely to occur in normal use.
注2：不考虑在正常使用中可能发生的基本绝缘失效。
NOTE 2 Failure of basic insulation is not considered likely to occur in normal use.
注2：不考虑在正常使用中可能发生的基本绝缘失效。
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