UNE-EN 13906-2:2013 Cylindrical helical springs made from round wire and bar - Calculation and design - Part 2: Extension springs (Endorsed by AENOR in August of 2013.)
2013UNE-EN 13906-2:2013 Cylindrical helical springs made from round wire and bar - Calculation and design - Part 2: Extension springs (Endorsed by AENOR in August of 2013.)