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    3.  
      Potassium fluoride
      Potassium fluotitanate
      Sodium monofluorophosphate
      Sodium fluoride
      Sodium fluorborate
      Zirconium potassium fluoride
      Strontium fluoride
      Calcium acetate monohydrate
      Polyaluminium chloride
      Magnesium fluoride
      Potassium fluoborate
      Potassium fluosilicate
      Barium fluoride
      Ammonium fluoroborate
      Calcium acetate
       
       

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