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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.
spread spectrum wireless audio-visual emergency and communication system, comprising wireless radio transceivers, computers with graphical user interface displays, directional antennas, wireless audio speakers, wireless visual displays, namely, led programmable electronic message boards, wireless radio transmitters, wireless radio receivers, wireless spread spectrum transmitters, wireless spread spectrum receivers, and emergency call-box units