A method developed by J. G. Ramsay (1969) for distinguishing three fundamental classes of folds based on their relative thicknesses and the curvatures of their surfaces, as indicated by the inclination (dip) of isogons.
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。