在以边界表示的实体造型中，如果为某实体元素保存部分的邻接实体元素，这便导致了部分关系的拓扑结构。
In the solid modelling of boundary representation, if we store part adjacent entities for some entity, for example, a first edge for a face, topology structures from part relationships will result.
地层实体用多面体的边界表示法来表示，由布尔集合运算来获得。
The final solids of strata are represented by polygonal boundary representations, which are constructed by Boolean set operations.
闭路拓扑原理和欧拉公式是检验实体模型边界表示的拓扑与几何一致性的重要工具。
For inspecting topological and geometrical unanimity of a solid model, principle of closed path topology and Euler′s formula are important tools.
闭路拓扑原理和欧拉公式是检验实体模型边界表示的拓扑与几何一致性的重要工具。
For inspecting topological and geometrical unanimity of a solid model, principle of closed path topology and Euler′s formula are important tools.
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