Corrugated board is a kind of sandwich structural materials and it can be studied as an orthotropic sandwich plate. 摘要瓦楞纸板是夹层结构材料中的一种，可以将其作为正交各向异性的夹层板来进行研究。
We will consider first the case of two-dimensional incompressible steady flow through orthotropic soil. 我们首先考虑二维不可压缩流体通过正交各向异性土层的定常流动。
