主要控制室升压，主阀关闭。
后解体分配阀，发现主阀体工作面已擦伤。
After the disintegration of the distribution valve, the main body was found face has scratches.
进口压力使主阀开启。
将主阀盖上的配管接头螺丝松开，释放阀内压力。
The main valve fittings with screw lid release, pressure release valve.
导阀可在主阀以外单独调定开启压力和关闭压力。
Pilot valve can adjust lift and close pressure solely out if main valve.
如果你能在邻居家打电话，叫煤气公司关掉外面的煤气主阀盘。
Turn off the gas at the outside main valve if you can and call the gas company from a neighbor's home.
软密封的主阀瓣能在95%以上的开启压力范围内获得高密封度。
Soft airproof main valve can obtain high airproof in the scope of over 95% lift pressure.
分析故障重点在主安全阀和液压水泵。
Analysis of the focus in the main safety valve failure and hydraulic pump.
当节流阀进一步打开时，主喷口开始工作。
Further opening the throttle valve activated the main fuel jet.
美国宇航局航天飞机每一个有3个燃料控制阀，为每个主引擎之一。
NASA space shuttles each have three fuel control valves one for each main engine.
美国宇航局航天飞机每一个有3个燃料控制阀，为每个主引擎之一。
NASA space shuttles each have three fuel control valves one for each main engine.
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