During the era of the Decade 1950 artificial devices have been invented for high efficiency projector up there. Capable of more opaque projector From transparencies projector, and slide projector
In the early 1950s, has invented a device for projecting images with a high rage. The more opaque projector. The projector transparencies from And projector
During the decade 1950 have invented invented a device for projecting powerful higher up. Ability more and more opaque projectors, projector from the transparency and slide projector.