<![CDATA[Ïã¸ÛÁùºÏ²Ê¿ª½± 12857-1:1997]]> /cms/render/live/en/sites/isoorg/contents/data/standard/02/36/23672.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± 12857-1:1997]]> <![CDATA[Ïã¸ÛÁùºÏ²Ê¿ª½± 12857-1:1997 - Optics and optical instruments — Geodetic instruments — Field procedures for determining accuracy — Part 1: Levels]]> /cms/render/live/en/sites/isoorg/contents/data/standard/02/36/23672.html /cms/render/live/en/sites/isoorg/contents/data/standard/02/36/23672.html 2001-12-06