- 2020
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- 2020
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钻探用无缝钢管产品技术参数
产品规格:O.D30-139.7mm,WT3-19mm执行标准:GB/T9808钻探用无缝钢管GB/T16950,地质岩心钻探钻具DIN2391,无缝精密钢管EN10305-1,精…
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产品规格:O.D30-139.7mm,WT3-19mm执行标准:GB/T9808钻探用无缝钢管GB/T16950,地质岩心钻探钻具DIN2391,无缝精密钢管EN10305-1,精…