DIN CEN/TR 16638
DIN CEN/TR 16638 Non-destructive testing - Penetrant and magnetic particle testing using blue light; German version CEN/TR 16638:2014
standard by Deutsches Institut Fur Normung E.V. (German National Standard), 05/01/2014
standard by Deutsches Institut Fur Normung E.V. (German National Standard), 05/01/2014