常开

• normal open

参考释义

常开 [cháng kāi]

• -
• 短语
  常开触点 normally open contact
  常开阀 normal(ly) open valve
  常开控制元件 normal(ly) open control element
  常开启接点 normally open(ed) contact
  常开选通电路 normally open gate
  常开状态 normally open