inlet valve closed 进气门闭
closed center valve 中间位置封闭的阀 ; 闭中心阀 ; 闭中央阀 ; 闭核心阀
closed exhaust valve 密闭排气阀 ; 封闭排气阀
closed crossover valve 正遮盖的换向阀 ; 正遮蔽的换向阀
normally closed valve [机] 常闭阀 ; 阀门 ; 当闭触点
SPAR VALVE CLOSED 灯翼梁活门由启动手柄和火警手柄控制
normally closed solenoid valve 常关式电磁阀 ; 常闭电磁阀
The valve may have a pair of helper springs urging the valve closed.
所述阀可以具有一对推动阀关闭的辅助弹簧。
Do not let pump run for long in the circumstance of discharge valve closed.
注意不要在排出阀关闭的状态下长期运转。
Keep return piping valve closed until trap fills with condensate. Slowly open valve.
保持回路管道阀门处于关闭状态直到疏水阀充满冷凝物为止。慢慢开启阀门。
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