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内蒙古801矿,701矿,都拉哈拉含铌白云岩(以下简称“都矿”)等,含稀有和稀土钠长石化碱性花岗岩铌矿床,储量大,多出
701 ore reserves in Inner Mongolia, Niobium-bearing dolomite in Dharahara (hereinafter referred to as “ore deposits”), etc., contain rare and rare earth sodium feldspathic alkaline granite niobium ore deposits with large reserves and more