Ключевые слова: accuracy, adjustable, angle, angles, antique, archeology, astrolabe, azimuth, brass, cartography, construction, device, elevation, engineer, engineering, equipment, geodesy, geodetic, golden, industry, instrument, latitude, lenses, level, longitude, measure, measurement, measuring, mechanism, metal, navigation, obsolete, old, precise, protractor, rangefinder, retro, road, site, survey, surveying, surveyor, tachometer, theodolite, tool, topographic, topography, transit, triangulation, vintage,