... : CCC, L&T, PEC, Rotary Engineering, Petrol Steel, JSL, CNPC, SINOPEC, CNOOC, CNCEC, etc.Automatic Root Pass, Fill and Cap Pass ... Fill and Cap Pass Welding Machine; automatic pipe welding machine; piping Features: 1Realize automatic Pipe root pass, fill and cap ... same one machine2Welding efficiency: 280-500D. I/8hrs3Speed of automatic MIG root pass: 180-200mm/min4Satisfy requirenments for nuclear- ...