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Normally Closed (NC) | 常闭

A normally closed (NC) contact pair is closed (in a conductive state) when it, or the device operating it, is in a de-energized state or relaxed state.

当触点或者操纵触点的设备处于断电状态或松弛状态，一个常闭触点闭合（处于导电状态）


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