This is normally done by charging the brake pipe fully from one end of the train and checking that it has charged at the other end.
通常的做法是从列车制动管的一端充气，观察另一端的变化。
2
Adopting the quick pipe connector to improve system tightness. After being parked for some time, the vehicle can be started without stoping for charging, thus realizing the fuel economy.
采用快插接头，改善系统密封性，停放一段时间后，不需停车充气即可起步，节省油料；
3
It provided a safety pressure controlling method in the condition of continuously gas injection of parasitical pipe (temporary casing) gas charging approach.