screw axis meaning in English

螺旋桨轴
螺旋轴线

Instantaneous screw axis
瞬时螺旋轴
N - fold screw axis
重螺旋轴
Single axis motions play a very important role in the analysis of the structure and motion problem since any euclidean motion can be decomposed by a rotation about one screw axis , followed by a translation along the screw axis
在计算机视觉的运动与结构分析中，存在一种特殊而又重要的运动形式，那就是单轴旋转运动。单轴旋转运动是指物体绕某一固定轴旋转，而不发生任何平移的运动形式。