... base course 承重层 ; 路面下层 ; 路基层 crushed stone base course 碎石块底盘 stabilized soil base course 稳定土基层 ...
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graded crushed stone base course 级配碎石底基层
Therefore he laid a base course of crushed stone 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。
Combining the construction practice of Fokai Express Highway, it introduces the measures and experience of construction quality control for the graded crushed - stone base course of flexible pavement.
结合佛开高速公路施工实践，介绍柔性路面级配碎石底基层施工质量控制的做法和经验。
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