N-axis 零向量

chain n axis 链轴

rotation n axis 旋转轴

pulsation n axis 脉动对称轴

absorption n axis 吸收轴

n-fold axis 重轴

N-S Axis Concept 纵轴空间概念

n-fold symmetry axis 重对称轴

n-fold symmetry axis n 重对称轴

n-fold screw axis n 重螺旋轴