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2 июн 1875 г. - Bell proves that telephones work

Описание:

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.

Добавлено на ленту времени:

Alexander Graham Bell

ByAlicia Gracidas-Guldan
20 дек 2018
0
0
532

Дата:

2 июн 1875 г.
Сейчас
~ 150 г назад
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