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30 dic 1834 anni - Long range electricity transfer

Descrizione:

Joseph Henry (United States) invented the electrical relay, which could send electrical currents long distances.

Aggiunto al nastro di tempo:

ASdmads a

ByJR

7 mesi fa

2

0

297

Data:

30 dic 1834 anni

Adesso

~ 190 years ago

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