DESIGN: a single sample study taking the data of L4 5 three dimensional infinite element model as object of research.
设计：以脊柱l4 ~ 5节段三维模型的相关数据为研究对象的单一样本研究。
Spatial data model is the core and base of three dimensional geographic information system design.
空间数据模型是地理信息系统设计的核心和基础。
Both design efficiency and quality were greatly enhanced with this three dimensional model software.
据此开发的三维模型软件，将更大地提高设计效率和质量。
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