retaining walls

同根派生

A low retaining wall at the edge of a roof, porch, or terrace.
門廊或者露台邊緣的固定的矮牆。
The site was surrounded by mud puddles, with a retaining wall.
該位置還畱著一堵牆,周圍曾經環繞著膠泥。
At last,the steps in design of retaining wall in clayey soil are given.
最後還給出了粘性土擋土牆的設計步驟。
There are an ancient river retaining wall for the East Side East Moat.
還有一條古河道爲東城東牆外的護城壕。
It can be the filtration layer of the dikes,river canal,seacoast,concrete and retaining walls.
可以做堤垻，河渠，海岸，混凝土，擋土牆的過濾層。