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GB/T8163-1999GB/T8162-1999ASTM A106DINJISBNEN 21*2.9-1033*2.9-1060*2.9-1073*2.9-1089*4.5-10114*5-10140*5-14168*6-20219*6-25273*6-25 325*6-25 355*6-25 406*8-25 457*8-25 508*8-25 559*8-25 609*8-30 seamless pipe, erw pipe, welded pipe