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1 Jan 1930 Jahr - Overhead Projector

Beschreibung:

A projector that was originally used by the U.S. military for training purposes was then distributed to schools for visual aides that can be seen by all students in the classroom.

Zugefügt zum Band der Zeit:

Education Timeline- EDU221

ByBrookley Buchanan
9 Mär 2020
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274

Datum:

1 Jan 1930 Jahr
Jetzt
~ 95 years ago
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