9
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.
[ instruments for seismic surveying-namely, towing assemblies for towing air guns behind vessels for marine seismic surveying, marine profiling systems, ] down hole seismic energy sources for use in seismic surveying, land seismic systems for use in seismic surveying on land, hydrophone streamers for towing behind vessels for marine seismic surveying, firing controls for firing air guns and preamplifier filters for use in seismic surveying