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 ... weld),and mixture gas protecting welder (MAG weld) .2.It can carry out the whole position and semi-automatic welding to the ...