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Yanhe spring karst water system is one of the famous springs in North China.
山西省延河泉岩溶水系统是我国北方岩溶大泉之一。
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The karst big spring is the Shanxi precious water resources;
岩溶大泉是山西宝贵的水资源；
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The karst big spring is the Shanxi precious water resources;
岩溶大泉是山西宝贵的水资源；
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