...从性质上可以分为拓扑结构（Topology Constraint）、结构约束（Architecture Constraint）以及尺寸约束（Dimension Constraint）。
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Weak Dimension & Constraint 弱尺寸或约束
Strong Dimension & Constraint 强尺寸或约束
dimension constraint relation 尺寸约束关系
dimension constraint relations 尺寸约束关系
three-dimension constraint theory 三维约束理论
By using the geometric constraint, the dimension constraint, the dimension equation and the dimension driving techniques of CAD, the typical simulation mechanisms are created.
采用CAD的几何约束、尺寸约束、尺寸方程和尺寸驱动技术，针对根据一些典型平面多自由度机构，构造出相应的模拟机构。
参考来源 - 平面多自由度机构运动分析的计算机模拟逼近法及应用The class acquisition of expression mode semantics, projection relationship semantics and dimension constraint semantics, and integration acquisition technology of tangency combined relationship, interpenetrate combined relationship and intersectedcombined relationship are emphatically introduced, which lay the foundation for further primitive recognition.
重点介绍了表达方式语义、投影关系语义和尺寸约束语义的分类获取技术，以及相切组合关系、相贯组合关系、截交组合关系语义的整合获取技术，为后续基元体信息的识别、理解和获取奠定基础。
参考来源 - 基于多粒度的产品信息获取技术研究·2,447,543篇论文数据，部分数据来源于NoteExpress
By using the geometric constraint, the dimension constraint, the dimension equation and the dimension driving techniques of CAD, the typical simulation mechanisms are created.
采用CAD的几何约束、尺寸约束、尺寸方程和尺寸驱动技术，针对根据一些典型平面多自由度机构，构造出相应的模拟机构。
Complexity of part variant design was formulated based on dimension constraint, and the complexity of part variant design was contrasted in the condition of before and after part classification.
提出了基于尺寸约束的零件变型设计复杂特性模型，比较了零件分类前后的变型设计复杂性。
For new design one, the dimension of the new electric spindle selected will be the interference constraint conditions and the machine will be without this interference.
对新的设计，先选定电主轴后，其尺寸参数，可作为干涉约束条件，可计算得到无电主轴干涉的并联机床设计参数。
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