地下水系所研究的范围通常是一个相对完整的地下水流域。

Studied area of ground water system is usually a ralaction integrated valley of ground water.

youdao

地下水系所研究的范围通常是一个相对完整的地下水流域。

Studied area of ground water system is usually a ralaction integrated valley of ground water.

youdao