... seam welding machine SAW,TIG,MIG,MAG,etc for circular/longitudinal seam competitive price ISO9001,CE HUAFEI automatic steel ... adopted according to working requirements, and is widely applied in circular seam welding fields, such as tube head welding, pipe ... be greatly increased.6.Welding parameters include oscillating speed, oscillation range, center position, and left/central/right residence time, all ...