// todo need optimize like in event.jsp. Add indexing or not indexing this page. Valdemar Poulsen invents the first magnetic recording (15 янв 1898 г. – 20 сент 1905 г.) (Лента времени)
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Valdemar Poulsen invents the first magnetic recording (15 янв 1898 г. – 20 сент 1905 г.)

Добавлено на ленту времени:

tv production

Bydanielle
27 сен 2017

Дата:

15 янв 1898 г.
20 сент 1905 г.
~ 7 years and 8 months
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