So, the dimension constraints in 3d can be consilient with graphs in 2d.
协同了尺寸三维约束与二维图形在维数上的不一致。
In the third chapter, the constraints mechanism of MDT is studied. Dimension constraints, geometric constraints and assembly constraints of MDT are analyzed.
第三章：研究了MDT的约束机制，分析了MDT支持的三种约束：尺寸约束、几何约束和装配约束的特点。
In the second chapter, the constraints mechanism of MDT is studied. Dimension constraints, geometric constraints and assembly constraints of MDT are analyzed.
第二章：研究了MDT的约束机制，分析了MDT支持的三种约束：尺寸约束、几何约束和装配约束的特点。
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