The reference surveying compasse is used for theodolites of 3T series (except 3T2KA) and 4T, it is to be fixed on the theodolite cover. Error of the thedodolite orientation relative to magnetic meridian is 30'
The nozzles allow to carry out sighting with minimum value of zenith distance and to perform auto collimation with the help of total station.
The enterprise produces the whole range of accessories required for realization of topographic-geodetic works: stakes, tripods, tribraches, optical centering devices (vertical collimators), reference surveying compasses, prism reflectors, cases.
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