normally open
常开：指一个电子元件
常用释义
英式发音
美式发音
基本释义
- 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。
例句
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1·Control type: normally closed, normally open, double acting.控制形式：标准常闭、常开、双作用。
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2·Limit switch, directly actuated, spring returned, normally open.直接启动、弹簧复位、正常闭合的限制开关。
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3·These valves can be normally closed, normally open or universal.这些阀门可以常闭，常开或普遍。
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4·Usually divided into normally open, normally closed and self-holding three.通常分为常开型，常闭型和自保持式三种。
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5·All of these are normally closed valves, except for reducing valves, which are normally open.所有这些都是正常关闭阀，除减少阀门，一般开。
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6·Any combination of normally closed, normally open or universal valves may be grouped together.任何结合在一起的常闭，常开或通用阀门可归纳。
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7·Limit switch, directly actuated, spring returned, normally open. Right-click for open or held closed.限制开关， 直接启动， 弹簧复位， 正常情况下为断路。右击断开或保持闭合。
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8·Options include direct acting and diaphragm type operations in a Normally Open or Normally Closed version.可选包括直接作用和隔膜式常开或常闭版本。
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9·Limit switch, directly actuated, spring returned, normally open. Switch can be specified as open or closed.限制开关，直接启动，弹簧复位，正常情况下为断路。可指定开关为断开或接通。
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10·Valve types include Normally Open and Normally Closed valves, for use in fuel, hydraulic, or pneumatic applications.阀门有常开和常闭两种，可用于燃油，液压或气动应用领域。