PHOTOGRAM INSTRUMENTS It includes the Baroni-Salmoiraghi phtotheodolite (1929), the Baroni-Salmoiraghi photogoniometer (1929), the Heyde phototheodolite (1928), the Heyde stereocomparator (1928), the Galileo phototheodolite (1960), the analogic optical-mechanical OMI Beta 2 plotting instrument (1961).
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