9 Electric apparatus and instruments for electrical engineering, namely for conducting, transforming, transmitting, accumulating, regulating or controlling, in particular electric conduits and cables, electric contact lines, electric plugs, electrical slip ring elements, electric conduit screw fittings, electric clamping boxes, electric end terminals and distributors, electric current collectors for contact lines, electric control panels; temperature control units for keeping the temperature of machines and their parts in a special range, plastic cable tracks being sleeves for electric cables; electric apparatus and instruments for weak-current engineering for conducting, transforming, transmitting, accumulating, regulating and controlling the distribution or use of electric current; items for the conveying of electricity and electrical energy, in particular plastic conduit for electric use and electric cables, electric contact lines, electric plugs, electrical connectors being slip rings, electric conduit screw fittings, electric clamp meter boxes, electric end terminal boxes and distribution units, electric current collectors for contact lines, electric control panels; contactless electricity, data transmission systems and energy transmission systems comprised of antennae, frequency converters, resonant coil systems for movable devices, electrical transmission cables and accessories thereof, namely frequency converters, electric condensers; accessories for non-contact power and energy transmission systems or data transmission systems, namely frequency converters, electrical storage batteries and capacitors; inductive and electromagnetic non-contact vehicle and apparatus guide systems, comprised of antennae, frequency converters, resonant coil systems for movable devices, electrical transmission cables and accessories thereof, namely frequency converters, electric condensers