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31 март 1939 г. - siemens

Описание:

siemens produced the first commercial transmission electron micrscope

Добавлено на ленту времени:

alex

ByAlexander Brusacoram
30 окт 2017

Дата:

31 март 1939 г.
Сейчас
~ 85 г назад
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