Therefore, it is a marine sedimentary - metamorphic iron ore deposit.

铁矿床属海相沉积变质成因.

互联网

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.

互联网

To reach iron - ore deposit, they had to bore through solid rock.

为了达到铁矿矿床, 他们只好钻透坚硬的岩石.

互联网