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1 gen 1930 anni - Overhead Projector

Descrizione:

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.

Aggiunto al nastro di tempo:

Education Timeline- EDU221

ByBrookley Buchanan
9 mar 2020

Data:

1 gen 1930 anni
Adesso
~ 94 years ago
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