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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.
equipment for aviation computations; namely, distance plotters, navigation plotters, aximuth plotters, holding pattern plotters, declitractors and map measurers, specifically, inch counters and fuel/speed plotters; compasses; compass protractors; calculators; audio-headsets, sunglasses, goggles, and infrared training glasses, and cases therefor; microphone and earphone frequency adapters; and prerecorded audio and video cassette tapes featuring aviation and flight instruction