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沂源县-沂源县位于山东省中部，隶属于淄博市，山东省最长的内陆河沂河发源于此，沂源因此而得名。下辖11镇、1个经济开发区，总面积1636平方公里，有人口56万（2009年）。沂源县是山东古人类发源地、山东屋脊生-yiyuanxian</br> generated by yvsou girl
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