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Unread 02-21-2004, 07:41 PM   #13
redleader
Thermophile
 
Join Date: Jun 2001
Location: The deserts of Tucson, Az
Posts: 1,264
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With a complicated enough phase change system, you can get 50 or 100C colder then dry ice. However its not easy (or cheap) to build systems like that.
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