As a new type of road material, the characteristics of foamed bitumen mixture are not understood fully.

泡沫沥青混合料是一种全新的道路材料，其有关特性尚不完全清楚。

youdao

As a new type of road material, the characteristics of foamed bitumen mixture are not understood fully.

泡沫沥青混合料是一种全新的道路材料，其有关特性尚不完全清楚。

youdao