#key.lever  a lever that actuates a mechanism when depressed
  supertype:  #lever  a rigid bar pivoted about a fulcrum
  subtype:  #backspace_key  #control_key  #return_key  #space_bar  #tab_key  #telegraph_key
  part of:  #action_mechanism
  member of:  #keyboard  device consisting of a set of keys on a piano or organ or typewriter or typesetting machine or computer or the like

No statement uses or specializes #key.lever; click here to add one.