Who can explain which brand of bus plug door is good?

At present, high-performance electronically controlled pneumatic plug doors have been widely used in new railway passenger cars and multiple units to improve the sealing and safety of passenger cars. An electrically controlled pneumatic plug door is composed of chassis, door leaf, drive, operation, door lock, electric control and other parts. The cylinder in the drive part is connected with the door leaf, trolley and pedal through a linkage mechanism, the door leaf is hung on the roller of the trolley, the fork in the door lock part is connected with the internal and external control devices through a steel wire rope, and the electromagnetic valve in the electric control part is connected with the cylinder in the drive part, the cylinder in the door lock part and the internal and external control devices in the control part through a circuit and an air circuit system. It is convenient, labor-saving and safe to open and close the doors, which can prevent the doors from squeezing passengers, and also realize the centralized control and individual control of the doors of the whole train, so that the doors of each car can be automatically opened and closed.