sub-base and base的意思|示意

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。

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。

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。

In addition, this structure includes an active area (collector) above the sub-collector, a base above the active area, and an emitter above the base.

此外，这种结构包括在副集电极之上的有源区(集电极)、在有源区之上的基极和在基极之上的发射极。

Non-cohere granular stone is widely used as a kind of material of road pavements, and it's also widely used in base or sub-base of flexible road surface in overseas by now.

无粘结粒料是一种应用广泛的路面材料，至今仍然广泛用于国外柔性路面的基层和底基层。