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GB5310，GB8163，GB3087的无缝钢管区 …
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GB5310，GB8163，GB3087的无缝钢管区 …
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http://wenda.so.com/q/1373098642063081
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AgricultureProductStocks
2013-7-6 · GB5310是高压锅炉用无缝钢管，GB8163是输送流体用无缝钢管，GB3087是低中压锅炉用无缝钢管 。 高压锅炉管 20G,SA106c ST45.8/3 GB5310-95 ASTMA106 …
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