... application of trucks and buses. longer life Semi metallic truck Brake Lining 1:No pollution , Noiseless ,little dust ... brake drum.3:Environment friendly, high temperature tolerance and steady friction coefficient4:Material:carbon fiber, ceramic, mineral fiber ,semi-metallic ... asbestos,Ceramic, Organic or according to customer’s requirements.Friction Coefficient0.42±0.06Garantee30,000-50,000 KM.Wear ...