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。
2
A systematic analysis is made of the causes for the frequent damage of dry-gas seals, axle vibration and gradual decrease in pumpdelivery encountered during the test run.