（3）单元坐标系（ECS, Element Coordinate System）， ECS使用的也是右手法则的x、y、z轴垂直坐标系，各轴 以小写字母（x、y、z）表示，主要用来表...
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Identifies an element coordinate system to be assigned to subsequently defined elements.
定义一个构件的坐标系统对齐于随后定义的构件。
The finite element equation is formulated with moving coordinate system in order to solve a typical problem.
为了解决烧蚀移动边界问题，采用了在动坐标系上建立有限元素方程。
Since the gear engagement is a common coupling form between rotors, the transfer matrix of skew gear engagement in global coordinate system is deduced based on the concept of coupling element.
齿轮啮合是转子之间常见的一种耦合形式，根据耦合单元的概念，推导了在全局坐标系下斜齿轮啮合的传递矩阵。
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