API 5L/ASTM A53 GR.B, CARBON STEEL, SAW STEEL QURU FOB TIANJIN USD/TON Tashqi diametri chàn (mm) 219 273 324 356 406 457 508 610 711 760 07 707 707 707 707 711 711 711 713 716 chàn (mm) 7 707 707 707 707 707 707 707 711 711 711 713 716 8 707 ...
Ko'proq o'qish