base of bitumen road

• 沥青路面基层

base of bitumen road的用法和样例：

例句

1. The achievements of this paper has important reference value to instruct the design and construction of lime-flyash base structure in our city even in the other areas.
   本文的研究成果对于指导我市乃至其它地区的二灰砂砾路面基层结构的设计和施工具有重要的参考价值。