INSTALLATION AND MAINTENANCE SERVICES IN THE FIELD OF MOBILE AND FIXED RADIO COMMUNICATION SYSTEMS, TELEVISION AND RADIO TRANSMISSION AND RECEIVING ANTENNA SYSTEMS AND CATV SYSTEMS

Scientific, audiovisual, optical, weighing, measuring, signaling, detecting, testing apparatus and instruments; apparatus and instruments for conducting, switching, transforming, accumulating, regulating or controlling electricity distribution or consumption; sound, image or data recording, transmission, reproduction or processing apparatus and instruments; recorded or downloadable media, software; personal computer application software for control system management; mobile applications