API 5L/ASTM A53 GR.B, CARBON STEEL, SSAW STEEL QURU TIANJIN USD/TON tashqi diametri (mm) 219 273 324 356 406 457 508 610 711 76218 587 587 587 587 587 587 587 587 587 chàn (mm) 7 587 587 587 587 587 587 587 587 587 587 587 587 8 587 587 ...
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