- Project Runeberg -  Kgl. Telegrafverkets apparater 1906 /
N:o 59-60. Induktionsöfverdrag

(1906) Tema: Telecom
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N:o 59. Induktionsöfverdrag,

difflindade.

N:o 60. D:o,

enkla.

[ Fotografi ]


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