%A %T %0 Journal Article %D 2002 %J Journal of Drainage and Irrigation Machinery Engin %R 10.3969/j.issn.1674-8530.2002.04.012 %P 39-40 %V 20 %N 4 %U {http://zzs.ujs.edu.cn/pgjx/CN/abstract/article_921.shtml} %8 2002-07-25 %X