1 сент 1950 г. - OHP

Описание:

Overhead Projector

It is made up of a base with a clear glass top housing an interior light and an adjustable arm with a lens and a mirror.

A transparent sheet is placed over the glass top. and the machine "projects" the sheet's writen material onto whatever surface the lens is facing.

Добавлено на ленту времени:

Дата:

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