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Normally Open (NO) | 常开

A normally open (NO) contact pair is open (in a non-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，一个常开触点断开（处于非导电状态）


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