Welding methods and technology of narrow gap quirk backing weld were discussed. Indirect quirk backing weld using manual hydrogenarcwelding is considered as the best result.
讨论了窄间隙深槽打底焊焊接方法和工艺，认为用手工氩弧焊进行单面深槽打底焊效果最好。
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The paper introduces the high toughnesses Ultra-low hydrogen electrode (new J807CF) which matches WCF—80 steel for manual arcwelding.