#pull.device  a device used for pulling something; "he grabbed the pull and opened the drawer"
  supertype:  #device  an instrumentality invented for a particular purpose; "the device is small enough to wear on your wrist"; "a device intended to conserve water"
  subtype:  #bellpull  a handle or cord that is pulled to ring a doorbell or a servant's bell etc.
  subtype:  #pull_chain  a chain (usually with a handle at the end) that is pulled in order to operate some mechanism (e.g. to flush a toilet)

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