All

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 D25 Biomedical and Dental Materials D001697 +
  D25.720 Polymers D011108 +
   D25.720.395 Fluorocarbon Polymers D005465 +
    D25.720.395.616 Polytetrafluoroethylene D011138 +
      D25.720.395.616.755 Proplast D011428