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фторополимер nstresses
chem. PTFE (MichaelBurov); polytetrafluoroethylene (MichaelBurov); polytetrafluoro ethylene (MichaelBurov); poly tetrafluoro ethylene (MichaelBurov); Teflon (MichaelBurov); Gore-Tex (MichaelBurov)