The Longqiao iron ore deposit is a large-scale hidden magnetite ore deposit.

安徽庐江龙桥铁矿属一大型隐伏磁铁矿矿床。

youdao

The Longqiao iron ore deposit is a large-scale hidden magnetite ore deposit.

安徽庐江龙桥铁矿属一大型隐伏磁铁矿矿床。

youdao