3ISO 17636-2-2013, Non-destructive testing of welds-Radiographic testing. Part 2: X and gamma-ray techniques with digital detectors [ S ]. Switzerland: ISO copy right office,2013.
4BS-EN- 584-1-2006, Non-destructive testing-Industrial radiographic film. Part 1:Classification of film systems for industrial radiography [ S ]. The United Kingdom: The Standards Policy and Strategy Committee,2006.
