StandardASTM API GB JIS DIN ASTM A106-2006 ASTM A53-2007 ASTM A312-2007 ASTM A335-2006 ASTM A179-1990 API 5CT API 5L GB 3087-1999 GB/T 8163-
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ASTM API GB JIS DIN ASTM A106-2006 ASTM A53-2007 ASTM A312-2007 ASTM A335-2006 ASTM A179-1990 API 5CT API 5L GB 3087-1999 GB/T 8163-1999 GB 9948-2006 GB/T 17396-1998 GB/T9711 JIS G3459-2004 JIS G3467-2006 DIN 17175