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rustic
Optics Master Joined: September/30/2011 Status: Offline Points: 1461 |
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Posted: April/10/2014 at 08:44 |
Some of this stuff has been around for as much as fifty years... not taught in my schooling. Too bad.
http://m.youtube.com/watch?v=xAWf3F8_zQk |
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