#governor.controller__regulator  a control that maintains a steady speed in a machine (as by controlling the supply of fuel)
  supertype:  #controller__control  a mechanism that controls the operation of a machine; "the speed control on his turntable was not working properly"; "I turned the controls over to her"
  subtype:  #timer.governor  a regulator that activates or deactivates a mechanism at set times

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