rt：三篇文章的题目如下：
1.Electrical analogue studies of the influence of soil compaction and smear in the vicinity of a pipe drain on drain performance
2.An electronic analog for unsaturated flow and accumulation of moisture in soils
3.A new analogue computer for the study of pumping tests under falling water-table conditions
谢谢大侠们了，没有帮我顶一下，有的支持一下，谢谢。。
