9 determining the water content in petroleum products; nautical and photographic apparatus and instruments, namely, underwater housings for cameras, underwater enclosures for cameras and underwater enclosures for photographic lenses; surveying apparatus and instruments; cinematographic apparatus and instruments; optical apparatus and instruments, namely, optical inspection apparatus, optical ports for underwater photography, dome ports for underwater photography, wet diopters, adapter lenses for underwater photography; weighing apparatus and instruments; measuring apparatus and instruments, namely, bevels, angle finders, clamp meters for measuring electricity, resistance measuring instruments, instruments for measuring length, and wheel alignment measuring apparatus, namely, rolling roads; signaling apparatus and instruments, namely, signaling devices for measurement and quality control of materials processing by laser; measuring apparatus and instruments, namely, apparatus for checking the temperature, pressure, quantity and concentration of gas and liquids; automotive testing equipment, namely, transmission testing and brake testing equipment; brake fluid testers; apparatus and instruments for conducting, distributing, transforming, accumulating, regulating or controlling electricity, namely, electricity conduits, electricity limiters, electrical adapters; apparatus for recording, transmission or reproduction of sound or images; blank magnetic data carriers, blank recording discs; blank recordable compact discs, DVDs and recordable digital video discs; cash registers, calculating machines, data processing equipment and computers; computer software for use as a spreadsheet and word processing; fire-extinguishing apparatus; electronic chips for the manufacture of integrated circuits; encoded magnetic cards, namely, magnetic identifying cards; hardware, namely, optical magnetic coded card readers and computer memories