... )The efficiency is 50 times as manual welding Automatic Elctro-gas Vertical Welding MachineSuitable for industries of: OIL AND ... GAS, PETROCHEMICAL, NUCLEAR POWER STATION, LNG CARRIER AND TERMINAL, etc.Reference: ... ., CNPC Group, SINOPEC GroupFeatures:1, The efficiency of Automatic Electro-gas Vertical Welding Machine is 50 times as manual welding, and ...