常闭

常闭 [cháng bì]

1. ■ normal close

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常用词组

1. ■ 常闭触点 normally closed contact;

2. ■ 常闭阀 normally closed valve;

3. ■ 常闭控制元件 normally closed control element;

4. ■ 常闭选通电路 normal closed gate;

5. ■ 常闭状态 normally off