... 2.Max. efficiency :50 times of manual welding(EGW) NAEC---- Minimize the outdoor work, Maxmize ... GAS, REFINERY FACILITIES, OFFSHORE &SHIPBUILDING, POWER PLANT, ETCReference: CCC, L&T, PEC, Rotary Engineering, Petrol Steel, JSL, ETC. Automatic Vertical Seam Welding ... MachineFeatures: 1Applicable to both bottom-to-top and top-to-bottom tank erection2Standard machine ...