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为有效地防止烷外钉螺经涵闸扩散到皖内，我们于1994－1995年对武汉市汉南区乌金农场安乐潭涵闸（以下简称涵闸）的阻螺工程进行了钉螺分布调查和阻螺效果试验。涵闸基本概况1992年4月，涵闸改造前是一座老式双重闸门引水涵闸。两道闸门间的距离10m，其间有一个长10m、宽10m、
In order to effectively prevent the extension of Culverts of Culverts to Anhui Province, we conducted a snail distribution survey and a snail-proofing test on the snail-break project of Anlatan Culvert at Wujin Farm in Hannan District of Wuhan City (hereinafter referred to as Culvert Gate) from 1994 to 1995 . Culvert basic profile In April 1992, culvert before the transformation is an old double-gate flood culvert. The distance between the two gates 10m, during which there is a long 10m, width 10m,