Voltage regulators; voltage stabilizers; voltage testers; electric voltage transformers; voltage monitoring units; ammeters; circuit testers; frequency meters; magnetometers; power controllers; current rectifiers; electric capacitors; comparators; phase modifiers; electric loss indicators; resistance measuring instruments; electrical measuring apparatus; laser measuring systems; measuring apparatus and instruments; electricity meters; data processing apparatus; detectors; temperature indicators; temperature sensors; heat regulating apparatus; hygrometers; tachometers; speed indicators; telemeters; thermometers, not for medical purposes; illuminometers; optical data media; photometers; batteries, electric; battery chargers; electrical communication machines and instruments; electric buzzers; computer programs [downloadable software]; computer software, recorded; computer programmes [programs], recorded; interfaces for computers; printed circuits; printed circuit boards; monitors [computer programs]; remote control apparatus; magnetic cores; resistance wires; cables, electric; conductors, electric.;