#piston_chamber__cylinder  a chamber within which piston moves
  supertype:  #chamber  a natural or artificial enclosed space
  subtype:  #hydraulic_brake_cylinder  a cylinder that contains brake fluid that is compressed by a piston
  part:  #intake_valve
  part of:  #compressor  a mechanical device that compresses gasses
  part of:  #engine_block__cylinder_block__block  a metal casting containing the cylinders and cooling ducts of an engine; "the engine had to be replaced because the block was cracked"
     part of:  #internal-combustion_engine__ICE  a heat engine in which combustion occurs inside the engine rather than in a separate furnace; heat expands a gas that either moves a piston or turns a gas turbine
        part of:  #motorboat__powerboat  a boat propelled by an internal-combustion engine
        part of:  #motor_vehicle__motorvehicle__automotive_vehicle  a self-propelled wheeled vehicle that does not run on rails
     part of:  #reciprocating_engine__reciprocatingengine  an internal-combustion engine in which the crankshaft is turned by pistons moving up and down in cylinders
  part of:  #pump  a mechanical device that moves fluid or gas by pressure or suction
     part of:  #engine_cooling_system__cooling_system__coolingsystem  equipment in a motor vehicle that cools the engine
        part of:  #motor_vehicle__motorvehicle__automotive_vehicle  a self-propelled wheeled vehicle that does not run on rails
     part of:  #fuel_system  equipment in a motor vehicle or aircraft that delivers fuel to the engine
        part of:  #aircraft  a vehicle that can fly
        part of:  #motor_vehicle__motorvehicle__automotive_vehicle  a self-propelled wheeled vehicle that does not run on rails

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