# A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
The polymer PTFE, an extremely slippery material that is inert to almost every known chemical; rocket uses include lubricants, release films, and reusable recovery wadding; patented by DuPont
# A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
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