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31 янв 1879 г. - Sir William Crookes studies the effects of a cathode ray tube experiment.
Добавлено на ленту времени:
1st Nine Weeks Honor Project Chemistry
By
Ayanna
18 окт 2018
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0
443
Дата:
31 янв 1879 г.
Сейчас
~ 146 г назад
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