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    • Accuracy calibration of the bars of levelling meters 

      Giniotis, Vytautas; Rekus, Donatas; Aksamitauskas, Vladislovas Česlovas (Geodezija ir kartografija = Geodesy and cartography / Vilniaus Gedimino technikos universitetas, 2007)
      Precision levelling is one of the most common geodetic measuring operations. The most modern geodetic instruments are quite sophisticated digital instruments that are supplied by photoelectric sensor arrays and optical–electronic ...