自顶向下装配（Top-Down assembly）是自装配件的顶级结点生成子装配和组件，在装配层次上建立和编辑组件，从装配件的顶级开始自顶向下进行设计建模，该装配设计方法...
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The model embodied the top-down design idea, achieved the respective management of assembly architecture information, mate information and parts information.
装配模型的结构体现了自项向下的设计理念，实现了装配树层次信息、配合信息和零件信息的分别管理。
Based on the idea of function design, an architecture of the assembly design system for injection mould in concurrent and collaborative environment was presented using top down pattern.
根据功能设计的思想，采用自顶向下模式，给出一个并行协同环境下注塑模具装配设计系统的框架，对功能至产品演化过程中的数据模型进行了分析。
The design system which is based on geometric model and the above assembly model can support the Top down, decomposition process and the concurrent design process.
基于产品几何模型和装配模型的设计系统，能够支持产品自上而下、逐步求精的设计过程和并行产品设计过程。
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