Welding methods and technology of narrow gap quirk backing weld were discussed. Indirect quirk backing weld using manual hydrogen arc welding 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。
This backing(internal) is specially designed for CO2 one-side welding of angle steel butt joints. Different backing sizes are supplied.
本衬垫适用于角钢对接内接头CO2单面焊使用，有各种规格供选用。
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