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1 янв 1937 г. - Technetium is the first articficially produced element.

Описание:

By Pierre and Segre in Italy

Добавлено на ленту времени:

TC99m

ByCaitlin
24 окт 2017

Дата:

1 янв 1937 г.
Сейчас
~ 87 г назад
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