2007DIN EN ISO 6520-1:2007-11 Welding and allied processes - Classification of geometric imperfections in metallic materials - Part 1: Fusion welding (ISO 6520-1:2007); Trilingual version EN ISO 6520-1:2007
2007DIN EN ISO 6520-1:2007 Welding and allied processes - Classification of geometric imperfections in metallic materials - Part 1: Fusion welding (ISO 6520-1:2007); Trilingual version EN ISO 6520-1:2007
1998DIN EN ISO 6520-1:1999 Welding and allied processes – Classification of geometric imperfections in metallic materials – Part 1: Fusion welding