Apparatus and instruments for conveying, distributing, transforming, storing, regulating or controlling electric current; Apparatus and instruments for recording, transmitting, reproducing or processing sound, images or data; Apparatus for recording, transmission, processing and reproduction of sound, images or data; Apparatus for recording, transmitting and reproducing sound and images

[ Apparatus and instruments for conveying, distributing, transforming, storing, regulating or controlling electric current; Apparatus for recording, transmission or reproduction of sound and images; ] Apparatus for recording, transmission, processing and reproduction of sound, images or data; [ Apparatus for recording, transmitting and reproducing sound and images; Apparatus for testing gas, liquids and solids; Apparatus for the recording, transmission and reproduction of sound and images; Ap...