This paper analyzes the surface water and underground water pollution status quo and pollution ways in Nenjiang valley.

对嫩江流域的地表水、地下水污染现状、污染途径进行了分析。

youdao

This paper analyzes the surface water and underground water pollution status quo and pollution ways in Nenjiang valley.

对嫩江流域的地表水、地下水污染现状、污染途径进行了分析。

youdao