Upper Pedal Assembly

Major function 
1. Transition connection: Provide a smooth transition surface to ensure the comfort and safety of passengers when passing between different carriages.
2. Sealing: Cooperate with other parts of the through passage to prevent dust, rainwater, noise, etc. from entering the interior of the carriage.
3. Support and protection: Provide support for the upper structure of the passageway while protecting internal mechanical components from external environmental influences.