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1 Jan 1887 Jahr - Emission - réception ondes radio

Beschreibung:

Heinrich Hertz (sur distance de 20 mètres)

Zugefügt zum Band der Zeit:

Les Evolutions Technologiques - la communication à distance

ByRaphael Courouble
20 Mär 2021
2
0
307

Datum:

1 Jan 1887 Jahr
Jetzt
~ 138 years ago
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