GOST R ISO 17123-7-2011 State system for ensuring the uniformity of measurements. Optics and optical instruments. Field procedures for testing geodetic and surveying instruments. Part 7. Optical plumbing instruments
2011GOST R ISO 17123-7-2011 State system for ensuring the uniformity of measurements. Optics and optical instruments. Field procedures for testing geodetic and surveying instruments. Part 7. Optical plumbing instruments