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AIzaSyAYiBZKx7MnpbEhh9jyipgxe19OcubqV5w
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1956-1960 (1 janv. 1956 – 1 janv. 1960)
Description:
The effieciency of solar cells was improved by Hoffman Electronics, from 8%-14%
Ajouté au bande de temps:
12 nov. 2018
0
0
304
econ
Date:
1 janv. 1956
1 janv. 1960
~ 4 years