本文主要讨论控制地下水位的田间排水沟的间距计算方法。

In this paper, a simplified iterative arithmetic to calculate spacing of field drain is developed.

youdao

本文主要讨论控制地下水位的田间排水沟的间距计算方法。

In this paper, a simplified iterative arithmetic to calculate spacing of field drain is developed.

youdao