摩托车曲轴组件动力学特性决定于惯性力椭圆主轴倾角和不平衡率两个参数。
The dynamics characteristic of the motorcycle crank module was described by these two parameters - the obliquity of the ellipse principal axis and the unbalance rate.
当行星绕太阳运行时，其轨道椭圆的主轴每次都会改变。
The main axis of the planet's orbital ellipse shifts each time when it goes around the sun.
结合直线电机的微量往复进给运动和电主轴的高速性能，实现了对椭圆零件的高速精密加工。
This system could precisely machine elliptic parts with high speed by the micro-reciprocating feed motion of linear motor and the high speed performance of electrical spindle.
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