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Magnifying Glass Lens | Large Magnifying Glass | TutorVista.com
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日期：2026-04-19
A lens is a piece of a transparent optical material that has one or two spherical surfaces. They are of two types - Convex and Concave lenses. A magnifying glass lens is a convex lens used to get a magnified image of an object. It is usually mounted in a ...看更多
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