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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.
fluid flow devices including meters, butterfly liquid control valves, samplers, gage glass protectors, stuffing boxes, separators for flow lines through which intermingled gases and liquids are passed which segregate the gases and liquids for separate discharge, well testers, calibrators, meter run units, and crank case oil level controllers