Also introduced here are the mixture ratio and design of pavement, base, sub-base, sub-seal and old road strengthening for typical pavement structure of different road classes in Zhengzhou.

同时，还对近阶段郑州市不同道路等级典型路面结构的面层、基层、底基层、下封层和旧路补强的配比和设计作了详细的介绍。

youdao

This paper analyses quality control and construction of cement bound granular material base and material of sub base construction in its process of mixing, spreading, pressing and maintenance.

本文重点介绍了水泥稳定粒料基层、底基层施工中的材料、拌制、摊铺、碾压、养生等环节的施工及质量控制。

youdao

Base; road base [highways] : the part of the road structure Below the base course and above the sub-base.

基层[公路]：路面层之下路基之上的道路结构部分。

youdao

Having done that, it goes back up and picks the second sub-list, which came from there. It's a down to base case, merges it.

就是从那里得来的,完成这些后,回到上一步。

麻省理工公开课 - 计算机科学及编程导论课程节选

If distributed manufacturing and snap-together assembly were really such bad ideas, its American rival Boeing would not have recently adopted the same approach, flying in sub-assemblies to its Seattle base from as far away as Japan and Italy.

ECONOMIST: Airbus