1,Supply truck trailer spring air double brake chamber. 2,Single chamber and double air chamber assembly. 3,T-24 BPW standard We ... semi-trailers.1,Supply truck trailer spring air double brake chamber. 2,Single chamber and double air chamber assembly.3,T-24 BPW standardProduce ... 9T to 18T. Machinal Suspension 2-4 axles,single point suspension and cantilever bogie system all the time.1,Huangjing Machine ...