... suspension and cantilever bogie system all the time. 1,Air chamber: single and double brake chamber. 2, pole long:207 and 255mm ... arc welding.2. HJ axles spindle, which was processed by digital controlled lathe, is made of alloy material. The bearing position ... .9. HJ key parts in the axle are processed by digital equipment, axle produce according to the international standard, high interconvertibility ...