
SPECIFICATION AND QUALIFICATION OF WELDING PROCEDURES FOR METALLIC MATERIALS - WELDING PROCEDURE SPECIFICATION - PART 1: ARC WELDING
出版:German Institute for Standardisation (Deutsches Institut für Normung)

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SPECIFICATION AND QUALIFICATION OF WELDING PROCEDURES FOR METALLIC MATERIALS - WELDING PROCEDURE SPECIFICATION - PART 1: ARC WELDING
出版:German Institute for Standardisation (Deutsches Institut für Normung)
專家解讀視頻