Kukana kwa dzimbiri kwa zida wamba za valve_ Teflon
Polytetrafluoroethylene (Teflon kapena PTFE), yomwe imadziwika kuti "pulasitiki mfumu", ndi polima pawiri yopangidwa ndi polytetrafluoroethylene ndi polymerization Kupatula chitsulo chosungunula cha alkali, PTFE sichidzimbiritsidwa ndi mankhwala aliwonse. Mwachitsanzo, akaphika ...
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