... for trucks,semi-trailers.Produce brake parts similar like brake drum,brake lining,brake air chamber,slack adjust, adjuster arm,kingpin ... exhaustion to increase safety.5.HJ use world famous brand grease, which can provide high lubricative performance hereby, can protect ... various camshafts for trucks, semi-trailer parts.2,produce Brake drum, Brake shoe and other spare parts.3,BPW standard. trailer ...