If the valves do not close fully the engine will not develop full power.
如果阀门不完全关闭，发动机将不能发挥全部动力。
If the valves do not close fully the engine will not develop full power.
如果气门关闭不严，发动机就不能发挥出全部的功率。
Sometimes valves will stick when cold But will work free as the engine warms up.
有时，发动机冷态时，气门也会粘住； 发动机预热后，气门工作就正常了。
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.
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。
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