介绍了一种研究路堤碎石层自然对流效应的实验方法。
An experimental technique to study the cooling effect of natural convection in the embankment ballast is introduced.
由于果岭是建造在碎石层和果岭混合物之上，坡度慢慢就变得松软了。
As the green is built up with the various rock and top mix layers, the slope begins to mellow.
人们曾经使用“石结”基层——几层由石粉黏结在一起连续的碎石层。
Macadam type bases involving successive layers of crushed rock bound with rock dust were also used.
应用推荐