(subclass OpenTopRailcar FreightCar) | Transportation.kif 2199-2199 | Open top railcar is a subclass of freight car |
(subclass Flatcar OpenTopRailcar) | Transportation.kif 2177-2177 | Flatcar is a subclass of open top railcar |
(subclass RotaryDumpCar OpenTopRailcar) | Transportation.kif 2218-2218 | Rotary dump car is a subclass of open top railcar |