ITU (International Telecommunication Union) is the United Nations Specialized Agency in the field of telecommunications. The ITU Telecommunication Standardization Sector (ITU-T) is a permanent organ of
the ITU. The ITU-T is responsible for studying techn
ITU-T X.419-1999 history
2011NF A91-473:2011 Metallic and other inorganic coatings - Chromate conversion coatings on zinc, cadmium, aluminium-zinc alloys and zinc-aluminium alloys - Test methods.
0000 NF A91-473:2001
1999ITU-T X.419-1999 Information technology Message Handling Systems (MHS): Protocol Specifications
1995NF A91-473:1995 CHROMATE CONVERSION COATINGS ON ZINC AND CADMIUM. TEST METHODS. (EUROPEAN STANDARD EN ISO 3613).