25 Mm Diameter Copper Resistance Steel Pneumatic T Type Butt Welding Welder Machine For Wire Product Introduction: A butt welding machine is a welding equipment that uses the resistance between the contact surfaces of two workpieces to melt and fuse metal through low voltage and high current. Welding machines, also known as current welding machines or resistance welding machines, are widely used in fields such as construction engineering and electronic products. Its working