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      API 605 - 1988 ֱ̼䓷m GB/T4701-4703-2000m
      GB /T 91129124 - 2000 ƹܷm DIN EN 1092-1-2002Wwϵܷm
      HG /T 20592 - 2009 ИIƹܷm(PN ϵ) ASME B16.5 - 2009 ܷmͷmܼ
      HG /T 20615 - 2009 ƹܷm(Classϵ) ASM E B16.47 - 2006 ֱƹܷm
      SH 3406 - 1996 ʯͻƹܷmϵ MSS SP - 44 - 2005 ƹܷm
      JB/T74~86.2-1994CеИI˜ʷm JIS B2220-2004՘˹ܷm
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