2014DIN EN 15317:2014-02 Non-destructive testing - Ultrasonic testing - Characterization and verification of ultrasonic thickness measuring equipment; German version EN 15317:2013
2014DIN EN 15317:2014 Non-destructive testing - Ultrasonic testing - Characterization and verification of ultrasonic thickness measuring equipment; German version EN 15317:2013
2007DIN EN 15317:2007 Non-destructive testing - Ultrasonic testing - Characterization and verification of ultrasonic thickness measuring equipment English version of DIN EN 15317:2007-05