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1956-1960 (1 Jan 1956 Jahr – 1 Jan 1960 Jahr)

Beschreibung:

The effieciency of solar cells was improved by Hoffman Electronics, from 8%-14%

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econ

12 Nov 2018

0

0

479

Datum:

1 Jan 1956 Jahr

1 Jan 1960 Jahr

~ 4 years

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