API 5L/ASTM A53 GR.B, KARBON STEEL, SSAW poʻlat quvurlari EXW TIANJIN USD/TON tashqi diametri 219 273 324 356 406 457 508 610 711 76 dollar 7,68$567,68$567,68$567,68$567,68$567,68$567,68 $567,68 $567,68 $567,68 $567,68 hài (mm) 7 $567,68 $56...
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