NF A09-231-4*NF EN 12543-4:1999 Non-destructive testing. Characteristics of focal spots in industrial X-ray systems for use in non-destructive testing. Part 4 : edge method.
1999NF A09-231-4*NF EN 12543-4:1999 Non-destructive testing. Characteristics of focal spots in industrial X-ray systems for use in non-destructive testing. Part 4 : edge method.