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洛阳市偃师、孟津两县的水文地理环境和地氟病病区类型及分布与其他地区不同。研究证实，引起该区地氟病有三大类型：一是饮水型氟病区；二是煤烟污染型氟病区；三是饮水与煤烟污染所致的混合型氟病区。该区地氟病的发病类型、分布及氟中毒病发生都与该区特定的水文地理环境及复杂的地质条件关系密切。证实了该区氟中毒以饮水型为主，煤烟污染型次之，并为防治措施提供了可靠依据。
Luoyang City, Yanshi, Mengjin two counties hydrofluoric geographical environment and endemic areas and distribution of ward different from other regions. Studies have confirmed that there are three types of endemic fluorosis: one is drinking water-type fluorosis; the other is soot-contaminated fluorosis; and the third is mixed-type fluorosis caused by drinking water and soot contamination. The incidence and distribution of endemic fluorosis and the occurrence of fluorosis in this area are closely related to the specific hydrogeological environment and complicated geological conditions in this area. Confirmed that fluoride poisoning in this area mainly drinking water, followed by soot pollution, and provide a reliable basis for prevention and control measures.