NBC-250F MAG Welding Machine 1.High efficieny, energy saving ... durable, economic NBC-250F Tap Type MAG Welding MachineFeature and Application1.It is practical and ... stable function.2.Three operation modes: continuous welding, spot welding, discontinuous welding, small splash, high success rate to ... by several times compared with manual arc welding, energy-saving significant cost reduciton of production ...