Unsichtbare Brücken
Documentary
193240m
Director: Hans Fritz Wilhelm
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.
Runtime
40m
Language
German
Released
Aug 18, 1932
Runtime
40m
Language
German
Released
Aug 18, 1932
Cast
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