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of the spot welding machine, the pressure is applied through the electrode, and the resistance heat generated by the current passing through the contact surface and adjacent area of the joint is used for welding. Row welding machine is also called wire welding machine. The welding machine of the spot welding machine, the pressure is applied through the electrode, and the resistance heat generated by the current passing through the contact surface and adjacent area of the joint is used for welding. Row welding machine is also called wire welding machine. The welding machine