Large propulsion hydrogen-oxygen rocket engine is one of the most important propulsion systems in lunch vehicle that can develop the technology of manmade planet, exploration of the universe and man-spaceflight in our country. The rocket engine testing is a very important element of the engine research, and it is the main method to check the performance of the engine. The propellant supply system is the crux of ground testing system, including propellant tanks, transportation pipelines, automatic pre...