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27 marzo 1930 anni - Overhead Projector

Descrizione:

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

Aggiunto al nastro di tempo:

EME

ByDayanira Feliciano
14 nov 2017

Data:

27 marzo 1930 anni
Adesso
~ 94 years ago

Immagini:

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