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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.
flow gauges for measuring the flow of oxygen; flow measuring apparatus, namely, gauges; flow meters; fluid flow meters; gas flow meters; meters for measuring gaseous flow; fluid metering apparatus in the nature of meters; fluid meters; gas metering devices in the nature of meters; gas meters; flow pressure meters; gas detecting apparatus in the nature of meters; gas detecting instruments in the nature of meters; gas masks; gas pressure indicators; gas sensing devices in the nature of meters; gas sensors for measuring gaseous flow; indicators for the optical monitoring of pressure of gases; fluid level sensors; level gauges; gauges for measuring the air content of storage tanks; gauges for monitoring the air content of storage tanks; pressure controllers in the nature of gauges; pressure gauges; pressure indicators; pressure measurement apparatus in the nature of gauges; aerometers; air analysis apparatus; apparatus for the analysis of air; apparatus for measuring pressure; instruments for measuring pressure; pressure measuring apparatus; measuring apparatus for air pressure; measuring instruments for air pressure; measuring sensors for air pressure; concentration meters; calibration instruments in the nature of sensors; gas flow detectors; signalling apparatus and instruments in the nature of gauges for indicating gas flow pressure; filters for respiratory masks; oxygen masks, other than for medical use; protective masks, other than for medical use; compressed air emergency respirators, other than for medical use; laboratory equipment in the nature of aspirators; breathing apparatus, except for artificial respiration in the nature of oxygen breathing units; oxygen sensors for environmental use, other than for medical use