DICT.TW Dictionary Taiwan

 axle·tree /-(ˌ)tri/
 輪軸,車軸

 Ax·le·tree n.
 1. A bar or beam of wood or iron, connecting the opposite wheels of a carriage, on the ends of which the wheels revolve.
 2. A spindle or axle of a wheel. [Obs.]
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 axletree
      n : a dead axle on a carriage or wagon that has terminal
          spindles on which the wheel revolve