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1 янв 1887 г. - Emission - réception ondes radio

Описание:

Heinrich Hertz (sur distance de 20 mètres)

Добавлено на ленту времени:

Les Evolutions Technologiques - la communication à distance

ByRaphael Courouble
20 мар 2021
2
0
307

Дата:

1 янв 1887 г.
Сейчас
~ 138 г назад
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