... cycle 3.durable, economic NBC-250F Tap Type MAG Welding MachineFeature and Application1.It is practical and reliable, ... carry, has stable function.2.Three operation modes: continuous welding, spot welding, discontinuous welding, small splash, high success rate to arc starting, ... can increase by several times compared with manual arc welding, energy-saving significant cost reduciton of production.4.The ...