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1 янв 1889 г. - Self-winding telephone exchange
Описание:
Strowger invented the self-winding telephone exchange in 1889. It consisted in calls without an operator.
Добавлено на ленту времени:
Telephony
By
mgonzalez
9 дек 2017
0
0
257
Дата:
1 янв 1889 г.
Сейчас
~ 135 г назад
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