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2 jun 1875 ano - Bell proves that telephones work

Descrição:

Watson happens to pluck one of the metal reeds that formed Bell's phonoautograph machine. This accidental move showed that a telephone could transmit sounds.

Adicionado na linha do tempo:

Alexander Graham Bell

ByAlicia Gracidas-Guldan
20 dez 2018
0
0
532

Data:

2 jun 1875 ano
Agora
~ 150 years ago
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