A line that marks the intersection of the axial surface of a fold with any other plane or surface. In practical terms it is the intersection of the axial surface with the surface of the Earth, or with a vertical profile through a fold sequence.
科学参考收录了60776条科技类词条，基本涵盖了常见科技类参考文献及英语词汇的翻译，是科学学习和研究的有利工具。