mortar lining

例句：

1. 1. The engineer used a mortar lining to reinforce the wall.
   工程师使用砂浆衬里加固了墙壁。
2. 2.The construction crew carefully laid down the mortar lining before starting the project.
   施工队在开始项目之前仔细铺设了砂浆衬里。
3. 3. The builders were using a special mortar lining to waterproof the basement.
   建筑工人正在使用一种特殊的砂浆衬里来防水地下室。