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AWS A2.4   2020   Standard Symbols for Welding, Brazing, and Nondestructive Examination 80 $
AWS A2.4   2012   Standard Symbols for Welding, Brazing, and Nondestructive Examination 80 $
AWS A2.4   2007   Standard Symbols for Welding, Brazing, and Nondestructive Examination 50 $
AWS A2.4   1998   Standard Symbols for Welding, Brazing, and Nondestructive Examination 30 $