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.

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结论山东省改水降氟工程的水氟超标现象严重。

Conclusions The phenomenon that water fluoride concentration outnumbers the standard is overwhelming.

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目的了解河南省降氟改水打井工程水氟含量和工程使用情况。

Objective To understand water fluoride concentration and application of the fluoride lowering well digging projects in Henan Province.

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