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API STD 598   2023   Valve Inspection and Testing 30 $
API STD 598   2016   Valve Inspection and Testing Seventh Edition; Errata August 22,1997 30 $
API STD 598   2009   Valve Inspection and Testing Seventh Edition; Errata August 22,1997 20 $
API STD 598   2004   Valve Inspection and Testing Seventh Edition; Errata August 22,1997 20 $
API STD 598   1996   Valve Inspection and Testing Seventh Edition; Errata August 22,1997 10 $