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24 июн 1920 г. - Rogers batteryless

Описание:

Inverted line- operated vacuum tube receiver in 1925 by Edward s. rogers jr.

Добавлено на ленту времени:

1920’s timeline

Bytaylor
6 ноя 2018

Дата:

24 июн 1920 г.
Сейчас
~ 103 г назад
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