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mar 21, 1780 - Lentes Bifocales por Benjamin Franklin.
Description:
Lentes bifocales son lentes correctivas que contienen dos potencias diferentes.
Added to timeline:
Alexander Chicas 1°-K-ITSI
By
Alexander Rivas
31 Oct 2017
0
0
1310
Date:
mar 21, 1780
Now
~ 246 years ago
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