晶体结构中的行列均是平移轴平移轴有无限多晶体微观对称元素螺旋轴( screw axis)：是一种复合的对称元素。其辅助几何要素为：一根假想的直线及与之平行的直线方向。
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instantaneous screw axis [物] 瞬时螺旋轴 ; 瞬时螺旋轴线
ternary screw axis 三回螺旋轴
quaternary screw axis 四元螺旋轴
screw axis of symmetry 螺旋对称轴
n-fold screw axis 重螺旋轴
right handed screw axis 右旋螺旋轴
micrometer screw axis 测微螺杆轴线
itantaneous screw axis 瞬时螺旋轴
i tantaneous screw axis 瞬时螺旋轴
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以上来源于: WordNet
Power reached the screw axis, Driven by the star wheel rotating screw.
动力传到螺杆轴上，由螺杆带动星轮旋转。
The screw axis equation of the general motion of a rigid body has been derived by means of a comparison method.
本文用比拟法推得了刚体一般运动的螺旋轴方程。
Screw axis of the flange-type connection between the use of, and ensure the connection of the interchangeability of shaft for easy maintenance.
各螺旋轴之间采用法兰式联接， 保证了联接轴的互换性，便于维修。
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