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Freon

Freons are a group of chlorofluorocarbons use primarily as a refrigerant[?]. Prior to their implication as a major contributor to the greenhouse effect, freons were also used as aerosol propellants[?] and to foam[?] up polymer materials.



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... - Wikipedia <<Up     Contents Michael Barrymore Michael Barrymore, born 4 May 1952, is a British comedian famous for his variety ...

 
 
 
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