The large quantity of scrap concrete came from building industry has become an important problem.

目前建筑行业产生的巨量废弃混凝土是一个亟待解决的问题。

youdao

The large quantity of scrap concrete came from building industry has become an important problem.

目前建筑行业产生的巨量废弃混凝土是一个亟待解决的问题。

youdao