API 5L GR.B/ASTM A53 GR.B, KARBONLI STEEL, LSAW po'lat quvur FOB TIANJIN tashqi diametri chàn (mm) USD/TON 406 457 508 609.6 711.1 762 816 7666 Devor 866. 663 668 668 Qalinligi 9,53 669 656 663 644 649 644 649 649 hàn (mm) 10 637 624 631 644 649 644 649 649 12...
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