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Overhead projector - Wikipedia
VEVOR VEVOR Tripod Projector Screen with Stand 70 inch 16:9 4K HD Projection Screen Stand Wrinkle-Free Height Adjustable Portable Screen for Projector Indoor & Outdoor for Movie, Home Cinema, Gaming, Office
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Education Business 4k Home Theater Daylight 3000ansi Lumens Rear Hdmi 1080p Full Hd 3d Dlp Projector Proyector Beamer For School - Projectors - AliExpress