The former is used to describe feature constraint relation of a component and the later is used to describe assembly constraint relations of an assembly.
特征约束关系图表示零件中特征之间的约束关系;装配约束关系图表达装配体中零件之间的约束关系。
参考来源 - 基于图论的装配公差建模方法·2,447,543篇论文数据，部分数据来源于NoteExpress
According to the complex mechanical parts with multiple position relations, we proposed a method of parametric design based on assembly constraint relations.
首先分析了零组件的一般参数化设计的常见方法，针对存在的定位关系复杂组件，提出了一种基于装配关系的参数化设计方法。
The author applies constraint relations, projective method and matrix operations to the displacement analyses of spatial RSCR, RRSRR, RRRSR, RERRR, and RRERR mechanisms.
本文运用了约束关系式、投影和矩阵运算等方法对空间RSCR、RRSRR、RRRSR、RERRR和RRERR等机构的位移进行分析。
India appears to have concluded that better relations with China will act as a constraint on China's support for Pakistan, India's old foe.
印度似乎已经得出结论，中印两国更好的双边关系将制约中国对印度的长期敌人巴基斯坦的援助。
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