#steam_engine__steamengine  external-combustion engine in which heat is used to raise steam which either turns a turbine or forces a piston to move up and down in a cylinder
  supertype:  #external-combustion_engine  a heat engine in which ignition occurs outside the chamber (cylinder or turbine) in which heat is converted to mechanical energy
  part of:  #steamship  #steam_locomotive
  part:  #steam_boiler__steamboiler__boiler  sealed vessel where water is converted to steam
     part:  #steam_whistle__steamwhistle  a whistle in which the sound is produced by steam; usually attached to a steam boiler
  part:  #crosshead  metal block that connects to a piston; it slides on parallel guides and moves a connecting rod back and forth
  part:  #steam_chest  the chamber from which steam is distributed to a cylinder

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