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1 янв 1930 г. - Overhead Projector

Описание:

In the United States, the overhead projector was used to train the US military, but has since been adapted into schools and organizations. The effectiveness of a common screen facilitates learning, making it an effective tool.

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Ed 131 Technology Timeline

ByVivian Chinwen Huang
29 ноя 2020
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452

Дата:

1 янв 1930 г.
Сейчас
~ 95 г назад
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