聚四氟乙烯

jù sì fú yǐ xī

Meaning

polytetrafluoroethylene (PTFE) (often referred to by the trademark Teflon)

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聚jùto assemble, to collect, to meet取乑四sìfour囗儿氟fúfluorine气弗乙yǐsecond; 2nd heavenly stem 烯xīalkene火希