[ Scientific, nautical, surveying, photographic, cinematographic, optical, weighing, measuring, ] Signalling, supervision checking, life-saving [ and teaching ] apparatus and instruments, namely, [ cables for optical signal transmission, blank optical discs, ] digital signal processors, [ photographic cameras, ] digital video cameras, and closed circuit TV systems for security and surveillance in the nature of cameras, [ switchers, monitors, ] microphones, and recorders, exclusively used in video surveillance and audio-video communication; apparatus and instruments for conducting, switching, transforming, accumulating, regulating or controlling electricity, namely, [ electric converters, ] electric control panels and electric switches, all these goods exclusively used in video surveillance and audio-video communication; apparatus for recording, transmission or reproduction of sound or images; [ magnetic data carriers exclusively used for video surveillance and access control systems pre-recorded with data featuring video surveillance and access control systems, recording discs, namely, pre-recorded CDs, video tapes, laser disks and DVDs featuring video surveillance and access control systems; ] all the aforementioned goods being sold as an integral part of systems for audio-visual communications and for safety engineering, namely, systems for video surveillance and access control [ ; fire-extinguishing apparatus ]