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The Ogra mine is a large salt mine located in central Romania in Mureș County, close to Ogra. Ogra represents one of the largest salt reserves in Romania having estimated reserves of 100 billion tonnes of NaCl. == References == 抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Ogra mine」の詳細全文を読む スポンサード リンク
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