... 3.Benz's supplier welding skeletal trailer chassis , auto chassis joints, chassis casting, auto chassis componentMaterialiron or other ... process: Stamping, deep drawing, bending, punching, threading, welding , tapping, riveting, grindingSurface treatment: Hot galvanized, polishing, ... , EN15085-2, ISO3834-3 High technique of welding, stamping, bending, coating, injection moldingCompany profile Aolin ...