<![CDATA[Ïã¸ÛÁùºÏ²Ê¿ª½± 31-2:1992/Amd 1:1998]]> /cms/render/live/en/sites/isoorg/contents/data/standard/02/89/28974.html Ïã¸ÛÁùºÏ²Ê¿ª½± standards and projects Ïã¸ÛÁùºÏ²Ê¿ª½±.org 60 /modules/isoorg-template/img/iso/favicon/red/favicon1.ico http://www.iso.org/ <![CDATA[Ïã¸ÛÁùºÏ²Ê¿ª½± 31-2:1992/Amd 1:1998]]> <![CDATA[Ïã¸ÛÁùºÏ²Ê¿ª½± 31-2:1992/Amd 1:1998 - Quantities and units — Part 2: Periodic and related phenomena — Amendment 1]]> /cms/render/live/en/sites/isoorg/contents/data/standard/02/89/28974.html /cms/render/live/en/sites/isoorg/contents/data/standard/02/89/28974.html 2006-03-17