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12h 23min, jan 1, 1931 y - Р. Руденберг получил патент на просвечивающий электронный микроскоп
Added to timeline:
Электронный микроскоп. История
By
Вера Черепанова
15 Nov 2017
0
0
606
Date:
12h 23min, jan 1, 1931 y
Now
~ 94 years ago
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