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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.
audio visual teaching materials and aids, namely-recording and slide projectors, tape recorders, records, reel to reel tapes, cassettes, transparencies, film strips, slides and related items namely, printed materials, teachers' guides, record jackets, tape boxes, spirit masters for duplication, and packaging materials sold as a unit for schools and other educational institutions