1.Applicable to both bottom-to-top and top-to-bottom tank erection 2.Max. efficiency ... AND 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 suitable for shell ...