API 5L/ASTM A53 GR.B, dur carbon, pibell ddur LSAW fob tianjin y tu allan i ddiamedr 外径 (mm) USD/tunnell 406 457 508 609.6 711.1 762 812 863.6 WALL 8 1,027 1,01111191919191919191919 1191919191919 9 1,004 1,012 988 988 988 988 988 壁厚 (mm) 10 ...
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