9 [ scientific, surveying, electronic, photographic, cinematographic, optical, weighing, measuring, signalling, checking, supervision, electric apparatus and instruments, namely apparatus and instruments for conducting, distribution, transformation, storage, measuring, regulation or control of electric current and voltage, temperature, and power; electrical cables; small electrical apparatus namely smoke detectors and central dust vacuums, electricity ducts, electric batteries; electrical branch boxes that provide conduits for electricity; active and passive electronic components namely junction boxes, electrical floor boxes, electrical terminals, semiconductors, computer memory, electronic assemblies and subassemblies, integrated circuits, commutators, magnets, transformers and towers conveying electrical power; telephones; apparatus for recording, transmission or reproduction of sound or images; magnetic recording media, namely cassettes, cd's cd-roms, and video discs; mechanisms for operation of coin-operated apparatus and vending machines; cash registers, calculating machines and data processing equipment; fire-extinguishing apparatus ]