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DIN ISO 17123-3
Optics and optical instruments - Field procedures for testing geodetic and surveying instruments - Part 3: Theodolites (ISO 17123-3:2001)
Edition
2019-01
DIN ISO 17123-2
Optics and optical instruments - Field procedures for testing geodetic and surveying instruments - Part 2: Levels (ISO 17123-2:2001)
Edition
2023-12
DIN EN ISO 6143
Gas analysis - Comparison methods for determining and checking the composition of calibration gas mixtures (ISO 6143:2001); German version EN ISO 6143:2006
Edition
2006-11