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1 gen 1935 anni - М. Кнолль предложил анализатор электронной трубки
Aggiunto al nastro di tempo:
Электронный микроскоп. История
By
Вера Черепанова
15 nov 2017
0
0
469
Data:
1 gen 1935 anni
Adesso
~ 89 years ago
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