NC Normally Closed  通常关闭

NO Normally Open  通常是打开的

normally closed  常闭的; 常闭; 正常闭合的

normally closed connection  常闭合的连接

normally closed contact  常闭触点; 正常闭路触点; 常开触点; 常闭接头

normally closed contactor  常闭接触器

normally closed contacts  正常闭路触点; 常闭接触

normally closed control element  常闭控制组件

normally closed microvalves  常闭型微阀

normally closed position  常闭合位置

normally closed push button switch  常闭按钮开关

normally closed solenoid valve  常闭电磁阀; 常关式电磁阀

normally closed valve  常闭阀

normally open  常开的; 常开; 正常断开的

normally open contact  正常断路触点; 常开触点; 常开接触; 核反应

normally open contactnational society of cable television engineers  国家有线电视工程师协会

normally open contactor  常开接触器

normally open contacts  常开接点; 正常开路触点

normally open microvalves  常开型微阀