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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.
respiratory apparatus for underwater diving comprising a self contained underwater breathing apparatus, harnesses, air supply cylinders, air pressure regulators, air supply tubes, mouthpieces, face masks, demand regulators, portable oxygen containers, diving backpacks, wet suits, buoyancy compensators, vests, gear bags, underwater cameras, low pressure inflators, gauges, including depth gauges, tank pressure gauges, temperature gauges, and compasses, commercial diving helmets and suits, commercial diving umbilical units and communicators, safety lenses, plano and corrective optical lenses, gas monitoring and analyzing apparatus, 'firemens' helmets, turn-out coats, bibs, overalls, coveralls, liners, backpacks for breathing equipment, and industrial safety clothing-namely, coveralls, overalls, jackets, and hoods having chemical and fire resistant properties, firemen's clothing and breathing apparatus and industrial respirators