20 ноя 1876 г. - Telephone (1876)
Описание:
The telephone was developed during the 18th century. It is a system that converts acoustic vibrations to electrical vibrations and signals to transmit sound. It was a modified version of a telegraph that could transmit sound.Добавлено на ленту времени:
Дата:
20 ноя 1876 г.
Сейчас
~ 148 г назад