valgusmõõteseade, mille skaalaga varustatud rööbastel vm sirgjoonelisel käiguteel võivad paikneda ja liikuda valgusallikad, fotomeeterpea vms valgusmõõtevahendid
light measuring device, on which light sources, photometer head, etc. light measuring devices can be located and move on rails equipped with a scale or on a straight path
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