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单词 treadle
释义 treadle
 —treadler /tred"leuhr/,  n.  
 /tred"l/,  n.  ,  v.  , treadled, treadling.
  n.  
  1. a lever or the like worked by continual action of the foot to impart motion to a machine.
  2. a platform, as on a bus or trolleycar, for opening an exit door.
  v.i.  
  3. to work a treadle.
 [bef. 1000; ME tredel stairstep, OE. See TREAD, -LE]
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