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Lieutenant Colonel
Posts: 7,860
Join Date: Feb 2004
Location: one
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Re: Light-Transmitting Concrete the future building material -
03-21-2004, 11:54 AM
Quote:
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Originally Posted by Hollywood
http://optics.org/articles/news/10/3/10/1
[img]http://optics.org/objects/news/10/3/10/concrete2.jpg[/img]
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