According to the parting direction and the description of boundary, the parting line of a body is decided and then the parting surface is designed.
根据开模方向，结合零件的边界描述确定零件上的分模线，进而对分模面进行设计。
The paper evaluates the limitations that semielliptical surface crack in a shaft is simplified to a unilateral crack in a finite boundary plane and a cross straight line crack in a semi infinite body.
评价了将轴表面半椭圆裂纹简化为有限边界平板的单边裂纹问题和半无限体表面穿透直线裂纹问题来处理的局限性。
Tangency is controlled by the first two control points from a surface boundary, assuming that these points lie in one line.
相切是由曲面边界的最初两个控制点控制的（假设这些点在一条线上）。
The treatment of some special line segments on body surface is studied by analyzing the validity of joint surface boundary. The forming process and drawing principle of aggregate are stated.
通过分析贴合面边界的有效性，研究形体表面某些特殊线段的处理，阐迷了集合体的构形过程及画图的原则。
The treatment of some special line segments on body surface is studied by analyzing the validity of joint surface boundary. The forming process and drawing principle of aggregate are stated.
通过分析贴合面边界的有效性，研究形体表面某些特殊线段的处理，阐迷了集合体的构形过程及画图的原则。
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