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27 März 1930 Jahr - Overhead Projector

Beschreibung:

Initially used by the U.S military for training purposes in WWII, overhead projectors quickly spread to schools and other organizations around the country.

Zugefügt zum Band der Zeit:

EME

ByDayanira Feliciano
14 Nov 2017
0
0
565

Datum:

27 März 1930 Jahr
Jetzt
~ 95 years ago

Abbildungen:

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