Double guns , dual pressurizingvalve and auxiliary valve control;
双加压阀及辅助阀控制；
2
Using this feature with the Purge Valve closed can result in over pressurizing the system or exceeding the Pressure Safety Relief Valve setting.
在放气阀关闭时使用这个功能，可能会导致系统压力过大或超过压力安全阀的设置压力。
3
The cryogenic helium pressure regulator is one of the most difficulty valve in cryogenic helium pressurizing technique which is applied first in LM3A rocket of China.