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21 март 1780 г. - Lentes Bifocales por Benjamin Franklin.
Описание:
Lentes bifocales son lentes correctivas que contienen dos potencias diferentes.
Добавлено на ленту времени:
Alexander Chicas 1°-K-ITSI
By
Alexander Rivas
31 окт 2017
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870
Дата:
21 март 1780 г.
Сейчас
~ 244 г назад
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