... treatment, solve the multi-point convex welding in the current shunt caused by welded, loose weld defects. especially to high-carbon ... treatment. solve the multi-point convex welding in the current shunt caused by welded, loose weld defects .especially to high-carbon ... treatment. solve the multi-point convex welding in the current shunt caused by welded, loose weld defects. especially to high-carbon ...