#gearing__gears__gear__geartrain__power_train__powertrain__train  wheelwork consisting of a connected set of rotating gears by which force is transmitted or motion or torque is changed; "the fool got his tie caught in the geartrain"
  supertype:  wheelwork  mechanical device including an arrangement of wheel in a machine (especially a train of gears)
  subtype:  epicyclic_train  reduction_gear
  part of:  engine  motor that converts thermal energy to mechanical work

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