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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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French resistance

... group. It also transmitted political and military information to Britain and helped to hide escaped Allied POWs. Vichy agent infiltrated the group and most members were ...

 
 
 
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