| 释义 |
- 常开：指一个电子元件，在没有外力作用时，电路处于开路状态，不允许电流流过。
1 ?常开 然365等公司和局指数到达3.3以下，此和局指数在欧冠不常开(Normally open)，故标准盘采用拜仁独赢。一场寂寞凭谁诉。 2 ?正常断开的 ... 正常断开方式：normal disconnected mode,NDM 正常断开的：normally open 正常动作程序，正常操作顺序：normal sequence of operation ... 3 ?通常是打开的 ... NNVT Number Nine Visual Technologies Inc. “老九”可视技术公司（美国，出品高性能可视加速器） NO Normally Open 通常是打开的 no Norway 挪威（域名） ... 4 ?常开型 一支常开型(NORMALLY OPEN)之 干簧管 ，若接近磁场，会闭合（CLOSE），若磁场远离后，则会回复开路状态。
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Control type: normally closed, normally open, double acting. - 2
Usually divided into normally open, normally closed and self-holding three. - 3
All of these are normally closed valves, except for reducing valves, which are normally open.
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