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Sigma KEE - FreightCar
KB Term: 

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FreightCar
A train car that is designed to carry freight, and not Humans.
Relationships      
Parents RollingStock A single rail car. Any RailVehicle that is not composed of other RailVehicles.
Children BoxcarBoxcar is the subclass of Railcars that are general-purpose closed cars for hauling freight.
 FiveWellStackCarFiveWellStackCars are five-unit that carry double-stacked containers.
 FlatcarFlatcars are Freightcars without sides or roofs.
 HydraCushionFreightCarHydraCushionFreightCars are FreightCars with hydraulic underframes to cushion their loads.
 OpenTopRailcarOpenTopRailcars are FreightCars that have no roof. They may have sides or not.
 TankCarTankCars are enclosed FreightCars used to carry fluids.


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