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Relation: subclass

direct-childrendocumentationgraph
Oval1这是 ClosedTwoDimensionalFigure 的类别，它是由一个 Cone 和 ClosedTwoDimensionalFigure 相交所产生的。^
    Circle.这是 Oval 的类别，以至构成 Circle 的 所有 GeometricPoint 和单一的 GeometricPoint，称为 Circle 的中心是等距的。^

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