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- 18 janvier 2018 à 09:01 (diff | hist) . . (+1 825) . . N Various Features Of Germanium Lens Revealed (Page créée avec « What is a Plano Concave Lens?<br><br>A 'Plano Concave Lens' is A lens that has one side that's concave, meaning that the optical surface has an inward curve with the outer... »)