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23 ч 50 мин, 31 март 1931 г. - Electron Microscope

Описание:

Max Knott and Ernst Ruska co-invented it to magnify an image.

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ByMichael O'Brien

14 сен 2017

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23 ч 50 мин, 31 март 1931 г.

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~ 94 г назад

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