n-fold axis n 重轴

n-fold symmetry axis n 重对称轴

n-fold screw axis n 重螺旋轴

n-fold axis 重轴

N-S Axis Concept 纵轴空间概念

n-fold screw axis 重螺旋轴

N-axis 零向量

n-fold symmetry axis 重对称轴

n erpendicular axis theorem 垂直轴定理

chain n axis 链轴