Unsichtbare Brücken

• Movies
• 1932-08-18
• DE
• Released
• 0h 40m
• Documentary

• 0.0
• 0

Production

Commerz-Film AG (Berlin)

Storyline

In the broadcasting center of a radio station, visitors are informed in a kind of educational course about how "electric waves" are generated and how they are converted into sounds that can then be heard on the radio.