(subclass EngineCoolingSystem PhysicalSystem) | Cars.kif 2141-2141 | Engine cooling system is a subclass of physical system |
(subclass LiquidEngineCoolingSystem EngineCoolingSystem) | Cars.kif 2162-2162 | Water cooling system is a subclass of engine cooling system |
(subclass AirEngineCoolingSystem EngineCoolingSystem) | Cars.kif 2182-2182 | Air cooling system is a subclass of engine cooling system |