NBC-270,NBC-350, NBC-500 Melting pole gas shielded welding machine MAG welder, MIG welder, NBC-270,NBC-350, NBC-500 Melting pole gas shielded welding machineCharacteristics: 1.Simple structure, reliable performance, less breakdown. 2.Convenient to maintenance and operation. 3.Large wire thrust, small noise and large scope of speed adjustment for feeding wires.4.Small splash and good welding ...