outer shaft lining

• 外层井壁

outer shaft lining的用法和样例：

例句

1. The paper also studies yieldable materialsused in outer lining and gives the relationship between the materials and the additional verticalforce transmitted to inner lining.
   同时研究了外层井壁的可压缩层材料，获得可压缩层材料与传递到内层井壁的竖直附加力的关系。