25
/ru/
ru
AIzaSyAYiBZKx7MnpbEhh9jyipgxe19OcubqV5w
January 31, 2021
4743239
423828
2

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.

Добавлено на ленту времени:

3 мес назад
0
0
99
Ed 131 Technology Timeline

Дата:

1 янв 1930 г.
Сейчас
~ 91 г назад
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