Here the three dimensional entity boundary is boundary surface mesh, which owns not only geometric property but also topology property.
此时，三维实体的“边界”是指“边界表面网格”，它既具有几何性质，又具有拓扑性质。
Secondly it was widely adopted that the advanced three-dimensional entity digital design method, virtual prototype technique and digital simulation technique in the processing of design.
在设计过程中，广泛采用先进的三维实体数字化设计技术、虚拟样机技术和数字仿真技术。
The nc machining simulation environment, including roughcast, tools, fixture and machine tool modeling, is constructed in computer by combining three-dimensional entity modeling and database method.
综合利用三维实体建模技术与数据库技术，在计算机仿真模型中，构建了包括毛坯、刀具、夹具及机床等部件的“真实”数控加工仿真环境。
Through analyzing the three-dimensional entity measurement and reconfiguration based on the buoyancy measurement, the paper has designed a new clamping device.
通过对基于浮力测量的三维实体测量与重构系统测量要求的研究，设计了一种夹持机构。
Through analyzing the three-dimensional entity measurement and reconfiguration based on the buoyancy measurement, the paper has designed a new clamping device.
通过对基于浮力测量的三维实体测量与重构系统测量要求的研究，设计了一种夹持机构。
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