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21 mars 1780 - Lentes Bifocales por Benjamin Franklin.

Description:

Lentes bifocales son lentes correctivas que contienen dos potencias diferentes.

Ajouté au bande de temps:

Alexander Chicas 1°-K-ITSI

ByAlexander Rivas
31 oct. 2017
0
0
1071

Date:

21 mars 1780
Maintenaint
~ Il y a 245 ans

Les images:

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