Movie
Unsichtbare Brücken
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.
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0h 40m
Runtime duration
Language
DE
Year
1932
Rating
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0 votes • HD
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Duration: 0h 40m
Quality: HD
Subtitles: Available
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Directors:
Hans Fritz Wilhelm
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