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27 дек 1906 г. - Creacion de la valvula

Описание:

En 1907, inventaba la válvula que modula las ondas de radio que se emiten y de esta manera creó ondas de alta potencia en la transmisión.

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Byivan salviulo
30 мар 2022
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27 дек 1906 г.
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~ 118 г назад
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