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Sigma KEE - FreightCar
KB Term: 

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freight car
A train car that is designed to carry freight, and not Humans.
Relationships      
Parents rolling stock 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.
 five well stack carFiveWellStackCars are five-unit that carry double-stacked containers.
 flatcarFlatcars are Freightcars without sides or roofs.
 hydra cushion freight carHydraCushionFreightCars are FreightCars with hydraulic underframes to cushion their loads.
 open top railcarOpenTopRailcars are FreightCars that have no roof. They may have sides or not.
 tank carTankCars are enclosed FreightCars used to carry fluids.


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