What is the effect of iron welding for seating production?

Do you know the seating iron welding choose those process? Will choose good welding process runs through security, use of time are very important guarantee: 1, lap, resistance welding series of projection welding can be considered. 2, resistance welding seam welding machine series. Docking and seal, these are only relative economic way of welding. The highest strength of welding, laser ﹢ compound welding arc. Is almost seamless welding, welding high strength. As some ashkenazi car roof welding technology. But the high cost of welding way.