Unsichtbare Brücken
HD
0
40 minIn 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.
Country:
DEGenre:
DocumentaryReleased:
1932-08-18Languages:
GermanCompanies:
Commerz-Film AG (Berlin)