Therefore he laid a basecourse of crushedstone on top of a compact footing instead of the costly stone foundation.
因此他就在压紧的路基上铺碎石基层，而不使用造价很高的石块路基。
2
Combining the construction practice of Fokai Express Highway, it introduces the measures and experience of construction quality control for the graded crushed - stonebasecourse of flexible pavement.