Crazy WeldingReal shot cold welding machine melting 5mm diameter copper rod February 23, 2021 - Leave a Comment Facebook Twitter Pinterest Crazy WeldingTue, February 23, 2021 12:51amURL:Embed:The video contains cold welding, argon arc welding, various welding materials for holding frame, various welding methods, argon arc welding welding teaching materials, etc. Facebook Twitter Pinterest