Automatic welding technologies for long-distance
2014-10-1u2002·u2002Automatic welding technology techniques of pipes by all-position self-shielded flux cored wires. Welding technologies comprise root welding, filling welding and cover welding, and are applicable to long-distance oil/gas pipelines made of X-80 steel; the welding torch is in plane swing with the amplitude set according to its groove width. 3.1.
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