Non-destructive testing - Measurement and evaluation of the X-ray tube voltage - Part 2: Constancy check by the thick filter method; German version EN 12544-2:2000— 6 стр.
Non-destructive testing - Radioscopic testing - Part 3: General principles for the radioscopic testing of metallic materials by X- and gamma rays; German version EN 13068-3:2001— 13 стр.
