overhead projector isolated white background free space for text |
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| navigate by keyword : audiovisual background business camera classroom closeup conference demonstration device diapositive digital education entertainment equipment film filmoscope focus isolated lamp lens motion movie multimedia object objective old optical overhead photo photograph photography presentation projection projector projectors retro screen seminar show showing slide studio tape technology transparencies video view vintage white work |
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| Slide projector isolated on white background. Free space for text |
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