资料来源 : Webster's Revised Unabridged Dictionary (1913)

Brush wheel \Brush" wheel`\
   1. A wheel without teeth, used to turn a similar one by the
      friction of bristles or something brushlike or soft
      attached to the circumference.

   2. A circular revolving brush used by turners, lapidaries,
      silversmiths, etc., for polishing.