... to customer request. We can supply various bouble air brake chamber for trucks, semi-trailers.Produce brake ... parts similar like brake drum,brake lining,brake air chamber,slack adjust, adjuster arm,kingpin, fifth ... and cantilever bogie system all the time. 1,Air chamber: single and double brake chamber. 2, ... , and it is once formed by 1200T oil manometer and connected by shielded arc welding.2. HJ ...