Scientific, surveying, electric, optical, weighing, measuring, signalling, checking (supervision) apparatus and instruments; data processing equipment and computers; clinometers; computer programs; lasers that are not for medical purposes; water level indicators; measuring apparatus; electric measuring devices; measuring instruments; material testing instruments and machines; measurement apparatus for mining equipment; gradient indicators; indicators for wear measurement; observation instruments; optical apparatus and instruments; air analysis apparatus; alidades; anemometers; precision balances; cables; capacity measures; and cases especially made for photographic apparatus and instruments