... 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 ... structureintegrated typeseparated typeseparated type NBC-270,NBC-350, NBC-500 Melting pole gas shielded welding ...