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1 gen 1887 anni - Emission - réception ondes radio

Descrizione:

Heinrich Hertz (sur distance de 20 mètres)

Aggiunto al nastro di tempo:

Les Evolutions Technologiques - la communication à distance

ByRaphael Courouble

20 mar 2021

2

0

307

Data:

1 gen 1887 anni

Adesso

~ 138 years ago

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