UNE-EN 4000:2001 Aerospace series- Metallic materials- Rules for the drafting and presentation of dimensional standards for metallic semi-finished products. (Endorsed by AENOR in February of 2002.)
2002UNE-EN 4000:2001 Aerospace series- Metallic materials- Rules for the drafting and presentation of dimensional standards for metallic semi-finished products. (Endorsed by AENOR in February of 2002.)