1221304 SzGeCERN 20210423013549.0 ISO-17637 eng 25.160.40 International Organization for Standardization. Geneva Non-destructive testing of welds Visual testing of fusion-welded joints Geneva ISO 2003 16 p SzGeCERN Engineering STANDARD http://cds.cern.ch/record/1221304/files/ISO_17637.pdf h 200946 withdrawn Reviewed in December 2019 Expert ICS-25.160 21 20100429 1650 CER01 20091111 PUBLIC 002857865CER https://catalogue.library.cern/legacy/1221304 BOOK STANDARD MIGRATED