A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Voice-frequency long-distance selecting system of siemens and Halske
Historical development; physical fundamentals; economic advantages and operating features.
Voice-frequency long-distance selecting system of siemens and Halske
Historical development; physical fundamentals; economic advantages and operating features.
Voice-frequency long-distance selecting system of siemens and Halske
Das Tonfrequenz-Fernwahlsystem der Siemens and Halske A.G
Thurow, W.H. (author)
1931
6 pages
18 Figs.
Article (Journal)
German
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