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6 янв 1941 г. - Horn Reflector Invented

Описание:

The Holmdel Horn Antenna was invented in 1941 by Alfred C. Beck and Harald T. Friis. It was used to locate measurements of low levels of weak background radiation.

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ByKaden Kemp
6 янв 2020

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6 янв 1941 г.
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~ 83 г назад
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