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21 marzo 1780 anni - Lentes Bifocales por Benjamin Franklin.

Descrizione:

Lentes bifocales son lentes correctivas que contienen dos potencias diferentes.

Aggiunto al nastro di tempo:

Alexander Chicas 1°-K-ITSI

ByAlexander Rivas
31 ott 2017
0
0
1071

Data:

21 marzo 1780 anni
Adesso
~ 245 years ago

Immagini:

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