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4 gen 1900 anni - Светораспределитель

Descrizione:

Лаборант Казанского университета Александр Полумордвинов подал патентную заявку № 10739 на конструкцию "телефота", ключевым элементом которого был механический «светораспределитель».

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Byalena
29 ott 2019
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355

Data:

4 gen 1900 anni
Adesso
~ 125 years ago
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