改水降氟工程的管理仍存在隐患。
There were still hidden troubles in the management of the water improvement project.
结论揭阳市改水降氟虽取得成效，但仍不理想。
CONCLUSIONS Though effect of the improving water project was certainly obvious in Jieyang City, but still not ideal.
目的了解山东省氟中毒病区水氟分布和改水降氟工程现状。
Objective To investigate the distribution of water fluoride and the present status of water-improving defluoridation projects in the endemic fluorosis areas in Shandong Province.
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