#tachometer__tach  measuring instrument for indicating speed of rotation
  supertype:  measuring_instrument__measuringinstrument__measuring_system__measuringsystem__measuring_device__measuringdevice  instrument that shows the extent or amount or quantity or degree of something
  subtype:  tachograph  a tachometer that produces a graphical record of its readings; used to record the speed and duration of trips in a motor vehicle

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