// todo need optimize like in event.jsp. Add indexing or not indexing this page. OHP (PROJECTOR) (1 янв 1970 г. – 1 янв 1990 г.) (Лента времени)
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OHP (PROJECTOR) (1 янв 1970 г. – 1 янв 1990 г.)

Описание:

Description: used in education and business before the advent of computer-based projection.

Interaction/exposure to: schools

Добавлено на ленту времени:

electronic age timeline

ByRawan Alhamad
11 дек 2019

Дата:

1 янв 1970 г.
1 янв 1990 г.
~ 20 years
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