... Friction Coefficient 2.Long life,Less wear 3.Competitive price 4.Various products 5.Works quietly 1.heavy vehicle brake ... ,copper base,semimetal,carbon base non-asbestos,ceramic,ect.2.Advantage:1) Stable friction coefficient2).Various products,more than ... protection5).Develop according to the samples or drawings3.Application:Heavy Duty Truck.Train.Bus,Automobile,petroleum drilling machine.4. Hundreds ...