normallyadv.通常；正常地normally open interlock工子点,常开联锁装置normally opened contact常开启接点normally closed circuit正常闭合电路normally-open contact常开接点, 常开触点normally ordered product正规乘积normally energized relay正常励磁继电器normally hydrated cement正常水化水泥normally closed contacts常闭接触器normally-closed contact常闭触点normally closed interlock常闭联锁装置,休止辅助触头,常闭合接点