... Air chamber:single and double brake chamber. 2, pole long:207 and 255mm 3, Special order ... 1,Air chamber: single and double brake chamber. 2, pole long:207 and 255mm. 3, Special order can ... kinds of suspension system and other trailer parts.2, We have automatic stamping machine,multi-stage ... ,24T-36T single point suspension(bogie) assembly,2-4 axles mechanical suspension assembly,28T cantilever bogie ...