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本文以西气东输二线管道工程主线路施工中X80钢在特殊地段管道连头为例,论述了SMAW(U)+SMAW(D)的焊接工艺。
This paper discusses the welding process of SMAW (U) + SMAW (D) with X80 steel pipe in special section of the main line of the second West-East Gas Pipeline Project as an example.