... 3834-3, ISO9001:2008 3.Benz's supplier welding skeletal trailer chassis , auto chassis joints, chassis casting, auto chassis componentMaterialiron ... bending, punching, threading, welding , tapping, riveting, grindingSurface treatment: Hot galvanized, polishing, chrome/zinc/nickel plating, PVC coating, anodize, E-coatingApplicable ... with your company in the near future. welding skeletal trailer chassis