24 сент 1875 г. - telephone was invented

Описание:

A telephone was used to contact other people in a place where they would have not been able to contact them before. For this to work both people required a telephone. It worked by someone saying something into mouthpiece which they travelled through to the other telephone and that person then heard what was said. helped for long distance communication.
was made by Graham Bell.

Добавлено на ленту времени:

Дата:

Изображения: