Electric wires; identification threads for electric wires; identification sheaths for electric wires; telephone wires; electric cables; fiber-optic cables; coaxial cables; sheaths for electric cables; electronic detector cables; electric detection circuits; electric conductors; electrical terminators; electric contacts; electrical ducts; electricity conduits; electric couplings; connections for electric lines; electric relays; electric couplings; electric accumulators; electric batteries; electric resistances; commutators in the nature of switches; electrical connectors; cable connectors; electric converters; transformers for electricity; gas, fluid and liquid leak detectors; wires of metal alloys in the nature of fuses; circuit breakers; branch boxes for electricity; junction boxes for electricity; connection boxes for electricity; control panels for electricity; switchboards; distribution boxes for electricity; distributing boards for electricity; electronic notice boards; testing apparatus not for medical purposes, namely, detectors to test for leaks of gas, fluids and liquids; distance recording apparatus; alarms in the nature of instruments for the detection of leaks of gas, fluids and liquids; transmitters of electronic signals; transmitting sets for telecommunication, namely transmitters and receivers; transmitters for telecommunication; apparatus and instruments for measuring, signaling, detection, tracking and control of leaks of gas, fluids and liquids, particularly water, acids, hydrocarbons and solvents; digital systems, namely, systems comprised of computers and computer software for measuring, signaling, detection, tracking and control of leaks of gas, fluids and liquids, particularly water, acids, hydrocarbons and solvents; apparatus for recording, transmission or reproduction of sound or images; calculating machines; data processing equipment; integrated circuit cards in the nature of blank smart cards; printed circuit boards; printed circuits; integrated circuit chips; integrated circuit micro-controllers; microprocessors; central processing unit processors; computer interfaces; computer monitors; data processing equipment in the nature of readers; notebook computers; software, namely, recorded programs for measuring, signaling, detecting, locating and checking leaks of gases, fluids and liquids, in particular water, acids, hydrocarbons and solvents; computer programs, namely, downloadable software for measuring, signaling, detecting, locating and checking leaks of gases, fluids and liquids, in particular water, acids, hydrocarbons and solvents; software for operating detection systems; software for measuring, signaling, detection, tracking and control of leaks of gas, fluids and liquids, particularly water, acids, hydrocarbons and solvents; downloadable electronic publications, namely, magazines and books on the subject of leaks of gases, fluids and liquids; water level indicators; electric loss indicators; voltage surge protectors; fire-extinguishing apparatus