API 5L GR.B/ASTM A53 GR.B, CARBON STEEL, LSAW STEEL PIPE FOB TIANJIN Taobh a-muigh Trast-thomhas 外 径 (mm) USD/TON 406 457 508 609.6 711.1 762 812 863.6 Wall 0 7 657 Tighead 9.53 664 651 657 638 638 638 638 638 壁厚 (mm) 10 632 619 626 638 638 638 638 638 12. .
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