Scientific, [ nautical, ] surveying, photographic, cinematographic, optical, weighing, measuring, signaling, [ checking in the nature of supervision, ] life-saving and teaching apparatus and instruments, namely, [ spectrometers, ] cameras, [ cinematographic projectors, optical glasses, signaling whistles, apparatus for checking flight parameters, lifesaving rafts, ] baby scales, gas flow monitors, electronic tire pressure monitors, electronic vibration monitors for use in buildings, electroni...