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10 ч 47 мин, 31 дек 1911 г. - Hans Greiger develops the Greiger counter, a detector for radioactivity

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20th Century

ByRafelle Marie Timog Allego
10 фев 2018

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10 ч 47 мин, 31 дек 1911 г.
Сейчас
~ 112 г назад
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