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30 Dez 1834 Jahr - Long range electricity transfer

Beschreibung:

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

Zugefügt zum Band der Zeit:

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ByJR

7 Mon. zuvor

2

0

297

Datum:

30 Dez 1834 Jahr

Jetzt

~ 190 years ago

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