A nine-intersection model is a common one used to represent the topological relations between 3d spatial objects, but it has a problem of great redundancy.
交模型是一种表达三维空间拓扑关系的常用方法，但存在着冗余度大等问题。
A nine-intersection model is a common one used to represent the topological relations between 3d spatial objects, but it has a problem of great redundancy.
交模型是一种表达三维空间拓扑关系的常用方法，但存在着冗余度大等问题。
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