扩展F-展开法
extended F-expansion method
the F-expansion method
(方程式略)扩展法
The equation is abbreviated) expansion method
（面元扩展）
Arc Pyramid structure in human resources
Ⅰ型裂缝扩展
model I crack propagation
3维裂纹扩展轨迹
three dimensional crack growth trajectory
Ⅲ型界面裂纹扩展
mode Ⅲ interface crack propagating
AutoCAD实体扩展数据
AutoCAD entity extended data