normally closed

基本解釋

Proximity limit switch, directly actuated, spring returned, normally closed. Right-click for closed or held open.
直接啟動、彈簧復位、正常閉合的鄰近限制開關(guān)。右擊接通或保持斷開。
When no channels are selected, the first channel of each bank, which is normally-closed, is connected to an output port.
當沒有通道被選中時，每組開關(guān)的第一個通道（常閉）被連接到一個輸出端口。
This paper introduced the setting of anti-car-running device in inclined lane orbit track and the application of two normally closed anti-car-running device.
介紹了煤礦斜巷軌道運輸中擋車裝置的設置和兩種常閉式擋車裝置的應用。
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For five hours this Sunday, some 10 miles of normally car-crowded Los Angeles streets will be closed to vehicular traffic and turned into a massive block party for cyclists, pedestrians, joggers, even stilt-walkers.
FORBES: LA's 10-Mile-Long Block Party