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view test2 @ 10647:bf6e7aeb4159
<rdococ> le//rn aperture// A usually adjustable opening in an optical instrument, such as a camera or telescope, that limits the amount of light passing through a lens or onto a mirror.
author | HackBot |
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date | Thu, 13 Apr 2017 02:24:21 +0000 |
parents | f04f06041b47 |
children |