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AIzaSyB4mHJ5NPEv-XzF7P6NDYXjlkCWaeKw5bc
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21 окт 1939 г. - Siemens produced the first commercial transmission electron microscope.
Добавлено на ленту времени:
science
By
Tyrus
27 окт 2017
0
0
671
Дата:
21 окт 1939 г.
Сейчас
~ 86 г назад
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