Tete'e a'a o mea masani valve_ Teflon
Polytetrafluoroethylene (Teflon po o le PTFE), e masani ona taʻua o le "tupu palasitika", o se polymer tuufaatasiga faia o polytetrafluoroethylene e polymerization Vagana mo uamea alkali liusuavai, PTFE e faigata ona corroded e so o se vailaʻau reagent. Mo se faʻataʻitaʻiga, pe a vela ...
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