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等高沟

45 bytes added, 00:32, 2 December 2016

→‎指南、视频和链接

* 指南：[http://www.bebuffered.com/downloads/sussman_contour_trenches.pdf 设计指南：等高沟] - 使用框架 “A” 和如何制作等高沟。

* 更多有关农业用水的更多百科知识：[http://web.archive.org/web/20151025174729/http://agropedia.iitk.ac.in:80/ 农业百科]

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