... fuel valve lift 喷油器升程 valve lift guard 阀升程限制器 VVL Variable Valve Lift 可变气门升程 ...
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High delivery lift and high backpressure required in fuel throttle valve test were obtained through higher rotation speed of the main pump.
利用长征系列发动机主泵作为动力源，提高其转速，解决了燃料节流阀试验要求的高扬程、高背压等技术难题。
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