The cross-section symbol of the pattern fill is a necessary material marker for the cross-sectional view of the solid object.
填充图剖面符号是机械制图、建筑制图中实体剖视图必不可少的材料标识。
By setting up a hierarchical mechanism motion model for conceptual design through the formal description of function symbol we provide a solid support to the computer aided conceptual motion design.
通过功能符号形式化描述建立分层次的机构概念运动模型,实现对计算机辅助概念运动设计的支持。
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