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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.
oxygen delivery systems for aircraft comprised of high pressure components, namely, oxygen cylinder assembly, rupture disc, high pressure manifold assembly, pyrothechnic actuator and regulator and low pressure components, namely, low pressure manifold assembly, solenoid valve, pressure switch and passenger mask