In this paper, unit moving trihedron is first constructed for a point on the surface of a revolution ellipsoid.

摘要以旋转椭球体面上某点为原点建立一个大地坐标单位活动坐标架。

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Differing from previous studies, the new method was derived from the idea of motion of moving trihedron along a predesigned path of contact on the predesigned (theoretical) tooth surface.

与以往的齿面加工方法不同，在新的齿面展成方法中，齿面展成运动是在沿预定接触迹线的曲面活动标架下设计的。

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Differing from previous studies, the new method was derived from the idea of motion of moving trihedron along a predesigned path of contact on the predesigned (theoretical) tooth surface.

与以往的齿面加工方法不同，在新的齿面展成方法中，齿面展成运动是在沿预定接触迹线的曲面活动标架下设计的。

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