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各种信号设备的电气接点须清洁()。

发布日期:2021-03-22

各种信号设备的电气接点须清洁()。
A

压力适当

B

接触良好

C

接点片磨耗不得超过厚度的1/5

D

接点片磨耗不得超过厚度的1/2

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