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Scientific, nautical, surveying, photographic, cinematographic, optical, weighing, measuring, signalling, checking (supervision), life-saving and teaching apparatus and instruments; apparatus and instruments for conducting, switching, transforming, accumulating, regulating or controlling electricity; apparatus for recording, transmission or reproduction of sound or images; magnetic data carriers, recording discs; automatic vending machines and mechanisms for coin-operated apparatus; cash registers, calculating machines, data processing equipment and computers; fire-extinguishing apparatus.
system for inspecting a conduit such as a sewer line and the like-namely, television cameras, television monitors, electrical television cables, electrical system controls, means for transporting television cameras through a sewer line, apparatus for measuring the distance to a television camera in a sewer line, and cameras for photographing the picture on television monitors