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Microwave radio & Transistor (1 янв 1947 г. – 31 дек 1947 г.)

Описание:

Microwave radio technology used for the first time for long distance phone calls & The transistor was invented at Bell laboratories.

Добавлено на ленту времени:

Дата:

1 янв 1947 г.
31 дек 1947 г.
~ 12 months