9 Electrical tools and implements, namely, electric transformers, electronic switchers for audio and video signals, electric conductors, accumulators, and electrical controllers, voltage regulators; voltage and amperage testers; apparatus and instruments for conducting, switching, transforming, accumulating, regulating or controlling electricity, namely, voltage stabilizers, electric cables, electric plugs, electric switches and distribution transformers; battery and storage batteries, included in this class; charging equipment for batteries and storage batteries, namely, battery chargers; accessories and parts for all the aforesaid goods, namely, battery cases and battery chargers; supervision, surveying, cinematographic, optical, weighing, measuring, signaling, checking, and life-saving apparatus and instruments, namely, scales, compasses, safety apparatus in the nature of inflatable floatation devices, and optical mirrors; surveying machines and instruments; photographic projectors and cameras, cinematographic cameras and projectors, weighing machines; instruments for measuring length and distance; rotating signaling lights and signaling buoys; meters and measuring tools, namely, electric meters, concentration meters and electronically operated distance measuring apparatus; fire-extinguishing apparatus; apparatus for recording, transmission or reproduction of sound or images; blank magnetic data carriers; blank magnetic and optical recording discs; mechanisms for coin-operated apparatus; cash registers, calculating machines, data processing equipment and computers; slide and movie projectors; enlarging equipment, namely, photocopiers and scanners which enlarge images on a paper; tripods for cameras; photocopying apparatus and machines, including electrostatic and thermic photocopying apparatus and machines; punch card machines for offices; machine-readable data carriers of all types with programs installed for safety instruction; exposed camera and slide films; electric contacts; special containers, namely, cases, sheaths, and housings adapted to electric cables, electric switches, and batteries; signaling whistles, including dog whistles; vehicle breakdown warning triangles; time switches; electrical equipment, namely, irons, soldering apparatus and soldering irons, sensors for measuring solar radiation, welding transformers