我们对1988年以前修建的防氟炉灶,1989～1991年连续3年调查,改炉户占调查屯户的76.5%。3年共调查983改炉户,停用的仅占4.88%,维修的占79.96%,完好未维修的占16.17%。大部分防氟炉发挥了应有的效益,起到了防治氟中毒的作用。建黎乡7～9岁儿童氟牙率1982年调查为100%,到1991年下降为53%。居民人均收入由1986年的431 For the three-year investigation of fluorinated stoves constructed before 1988, we changed the number of furnaces to 76.5% of the surveyed households in 1989-1991. In the past three years, a total of 983 households were investigated, only 4.88% were disabled, 79.96% were repaired, and 16.17% were intact and not repaired. Most of the anti-fluoride furnace to play its due benefits, played a role in prevention and treatment of fluoride poisoning. The incidence of dental fluorosis in children aged 7-9 years in Jianli Township was 100% in 1982 and dropped to 53% in 1991. Per capita income of residents from 431 in 1986