فریون اور اس کا طریقہ کار: ایک جامع ریسرچ
Freon is a brand name coined by DuPont (now Chemours) to describe a family of synthetic chemical compounds known as chlorofluorocarbons (CFCs), hydrochlorofluorocarbons (HCFCs), and hydrofluorocarbons (HFCs).
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