1353241 SzGeCERN 20210423011947.0 NF-EN-10307 eng 77.040.20 Association Française de Normalisation. Paris Non-destructive testing ultrasonic testing of austenitic and austenitic-ferritic stainless steels flat products of thickness equal to or greater than 6 mm (reflection method) Paris AFNOR 2002 20 p SzGeCERN Engineering STANDARD http://cds.cern.ch/record/1353241/files/NF-EN-10307.pdf h 201121 21 20110413 1356 CER01 20110413 PUBLIC https://catalogue.library.cern/legacy/1353241 BOOK STANDARD MIGRATED