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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.
recessed fixture system for use with electric lights and parts therefor-namely, support members, reflectors, ballasts, starters, lenses, lens support brackets, end plates, lamps, fuses, wire, bridging tees, channel members, raceways, sockets, socket holders and center cross plates, all sold as a unit