为系统地了解降氟改水设施，管理和使用的情况，改水后氟中毒的防治效果和改水所取得的经济效益，根据河南省降氟改水综合效益评价方案，我们于１９９８年６月２０日至７月６日对博爱县已建工程进行了抽样调查，现将调查结果报告如下：１基本情况博爱县位于河南省西北部，... In order to systematically understand the situation of the facilities for the improvement and management and use of fluoride-lowering water, the prevention and control of fluorosis and the economic benefits of water diversion after water diversion, according to the comprehensive benefit evaluation plan of reducing fluoride and water in Henan Province, From January 20 to July 6, a sample survey of the existing projects in Bo’ai County has been carried out. The survey results are reported as follows: 1 Basic Situation Bo’ai County is located in the northwest of Henan Province, ...