DIN ISO 17123-2:2021-02 Optics and optical instruments - Field procedures for testing geodetic and surveying instruments - Part 2: Levels (ISO 17123-2:2001); Text in German and English / Note: Date of issue 2021-01-08
2023DIN ISO 17123-2:2023-12 Optics and optical instruments - Field procedures for testing geodetic and surveying instruments - Part 2: Levels (ISO 17123-2:2001)
2021DIN ISO 17123-2:2021-02 Optics and optical instruments - Field procedures for testing geodetic and surveying instruments - Part 2: Levels (ISO 17123-2:2001); Text in German and English / Note: Date of issue 2021-01-08
2021DIN ISO 17123-2:2021 Optics and optical instruments - Field procedures for testing geodetic and surveying instruments - Part 2: Levels (ISO 17123-2:2001); Text in German and English