Rail transit is an important part of the transportation system. In recent years, with the application of new rail transit technology, rail transit transport towards high-speed, heavy-duty development, wheels in complex operating conditions and harsh conditions, by the speed effect and braking mode

Rail transit is an important part of the transportation system. In recent years, with the application of new rail transit technology, rail transit transport towards high-speed, heavy-duty development, wheels in complex operating conditions and harsh conditions, by the speed effect and braking mode