(subclass TwoCylinderEngine IntermittentCombustionEngine) | Cars.kif 4540-4540 | TwoCylinderEngine 是 IntermittentCombustionEngine 的 subclass |
(subclass HarleyDavidsonKnuckleheadEngine TwoCylinderEngine) | Cars.kif 4578-4578 | HarleyDavidsonKnuckleheadEngine 是 TwoCylinderEngine 的 subclass |
(subclass HarleyDavidsonPanheadEngine TwoCylinderEngine) | Cars.kif 4682-4682 | HarleyDavidsonPanheadEngine 是 TwoCylinderEngine 的 subclass |