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自顶向下的模具ＣＡＤ过程能提高结构设计效率，但装配信息建立困难，为此提出了新的装配模型，并进一步实现了装配关系的描述及可视化。
Top-down mold CAD process can improve the efficiency of structural design, but the assembly information is difficult to set up. Therefore, a new assembly model is proposed and the description and visualization of the assembly relationship are further realized.