normally closed contactor
normally closed contact ==> 常闭接点=>常时闭路接点,NC接点 normally closed contactor ==> 常闭接触器 normally closed interlock ==> 常闭合接点,常闭联锁装置,休止辅助触头 ..
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①分别接通各个接触器，依次拨通相应的限位开关和过电流继电器常闭触头，查看其切断控制电流的能力。
Respectively through the various contacts, in order to dial the corresponding limit switches and over current relay normally closed contacts, to see the ability to cut off the control current.
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