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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:

econ

12 nov. 2018

0

0

476

Date:

1 janv. 1956

1 janv. 1960

~ 4 years

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