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来自维基百科,自由的百科全书
西魏废帝二年(553年)设置洋中郡,治所不详,约在今西乡县一带。与洋川郡、丰宁郡、怀昌郡同属于洋州。北周天和五年(570年),废除怀昌郡。隋文帝开皇三年(583年)废洋川郡、丰宁郡、洋中郡,属县直辖于洋州。
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