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释义
the world > physical sensation > sight and vision > optical instruments > instruments for observing > [noun] > for viewing photographs (4)
photoscope1875

An optical apparatus by means of which photographs placed inside it may be viewed. Now historical.

graphoscope1879

An apparatus containing a magnifying lens arranged for viewing engravings, photographs, etc.

photochromoscope1881

A device for imparting the effect of colour to monochromatic photographs. Obsolete.

viewer1934

An optical device used for viewing images recorded on a particular medium, esp. those recorded on microfilm.

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