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sep 19, 2008 - 2008年9月19日是日国内首套现代化大口径直缝埋弧焊管机组宝钢集团有限公司大口径直缝焊管生产线建成投产。

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2008年9月19日是日国内首套现代化大口径直缝埋弧焊管机组宝钢集团有限公司大口径直缝焊管生产线建成投产。

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工业大事年表

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sep 19, 2008

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~ 17 years ago

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