NF A89-010-6:1994 SPECIFICATION AND APPROVAL OF WELDING PROCEDURES FOR METALLIC MATERIALS. PART 6 : APPROVAL RELATED TO PREVIOUS EXPERIENCE. (EUROPEAN STANDARD EN 288-6).
1994NF A89-010-6:1994 SPECIFICATION AND APPROVAL OF WELDING PROCEDURES FOR METALLIC MATERIALS. PART 6 : APPROVAL RELATED TO PREVIOUS EXPERIENCE. (EUROPEAN STANDARD EN 288-6).