calipers
 (pl.)彎腳器,測徑器
 Cal·i·pers n. pl.  An instrument, usually resembling a pair of dividers or compasses with curved legs, for measuring the diameter or thickness of bodies, as of work shaped in a lathe or planer, timber, masts, shot, etc.; or the bore of firearms, tubes, etc.; -- called also caliper compasses, or caliber compasses.
 Caliper square, a draughtsman's or mechanic's square, having a graduated bar and adjustable jaw or jaws. --Knight.
 Vernier calipers. See Vernier.
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 calipers
      n : an instrument for measuring the distance between two points
          [syn: caliper, calliper, callipers]