retaining walls

同根派生

A low retaining wall at the edge of a roof, porch, or terrace.
门廊或者露台边缘的固定的矮墙。
The site was surrounded by mud puddles, with a retaining wall.
该位置还留着一堵墙,周围曾经环绕着胶泥。
At last,the steps in design of retaining wall in clayey soil are given.
最后还给出了粘性土挡土墙的设计步骤。
There are an ancient river retaining wall for the East Side East Moat.
还有一条古河道为东城东墙外的护城壕。
It can be the filtration layer of the dikes,river canal,seacoast,concrete and retaining walls.
可以做堤坝，河渠，海岸，混凝土，挡土墙的过滤层。