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jan 7, 1972 - Д. Крафорд, совершенствование светодиода
Added to timeline:
История создания ламп (накаливания, люминисцентных, светодиодных)
By
Анна
12 Dec 2017
1
0
952
Date:
jan 7, 1972
Now
~ 54 years ago
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