UNE-EN 13237:2012 Potentially explosive atmospheres - Terms and definitions for equipment and protective systems intended for use in potentially explosive atmospheres (Endorsed by AENOR in April of 2015.)
2015UNE-EN 13237:2012 Potentially explosive atmospheres - Terms and definitions for equipment and protective systems intended for use in potentially explosive atmospheres (Endorsed by AENOR in April of 2015.)