公路路基 meaning in English

carriage foundation

Design specifications of road subgrade for forest highway
林区公路路基设计规范
Technical specification for construction of highway subgrades
公路路基施工技术规范
The types of highway foundation defects and treatment measures
公路路基病害类型及处治对策
Field test methods of subgrade and pavement for highway engineering
公路路基路面现场测试规程
Construction of highway embankment going through swelling soil
穿越膨胀土地区的公路路基的施工

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