... standard.420*200 and 420*180mm Huajing Brand Brake Shoe Brake shoe is adopted Q345 and Q235 as the materials ... concentric degree within 0.02MM strictly.4.HJ brake lining is high performance, non-asbestos, non- ... heat resistant.7.HJ wheel hub and brake drum use the international standard material of ball ... trucks, semi-trailer parts.2,produce Brake drum, Brake shoe and other spare parts.3,BPW standard. ...