Functional division and administrative region may influence the spatial structure of city image of residents. The Yellow River, Mt. Baita and Mt. Wuquan have played a role of edge elements.
功能分区、行政区划影响着城市居民的总体城市意象空间结构，黄河、白塔山和五泉山却起到了边缘要素的功能。
UML technology-based augertype functional design method of"core to edge"and"trunk to refined"was adopted to make every function of the surface modeling system a comparatively well-defined arrangement.
使用UML技术，采用核心→边缘、主干→细化的螺旋式功能设计方式，使得所设计的曲面造型系统的各种功能拥有比较清晰的层次性。
Features: Drum sealing performance, no waste edge horizontal blanking, synchronization is correct, simple, functional, replacement of mold and easy operation, stable performance strong.
滚筒式热封性能好，横向无废边冲裁，同步正确无误，结构简单、功能齐全、更换模具方便、操作简单、稳定性能强。
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