... trucks,semi-trailers.Produce brake parts similar like brake drum,brake lining,brake air chamber,slack adjust, adjuster ... system all the time.1,Huangjing Machine manufacture Co.,LTD was found in 2002 and is an ... heat resistant.7.HJ wheel hub and brake drum use the international standard material of ball iron ... for trucks, semi-trailer parts.2,produce Brake drum, Brake shoe and other spare parts.3,BPW ...