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AWS B2.4   2023   Specification for Welding Procedure and Performance Qualification for Thermoplastics 80 $
AWS B2.4   2012   Specification for Welding Procedure and Performance Qualification for Thermoplastics 80 $
AWS B2.4   2012   Specification for Welding Procedure and Performance Qualification for Thermoplastics - 2nd Edition 80 $