Its design principles, working methods and its technical, economic and social benefits are analysed so as to provide a reference for studies on the following road system.
阐述了其设计原理、施工方法，对其技术经济和社会效益进行分析，供以后道路体系研究参考。
Its design principles, working methods and its technical, economic and social benefits are analysed so as to provide a reference for studies on the following road system.
阐述了其设计原理、施工方法，对其技术经济和社会效益进行分析，供以后道路体系研究参考。
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