Build an Iron Mine 建一个铁矿
It began in the 1980s with the opening of an iron mine called Bayan Obo in Inner Mongolia.
这要追溯到上世纪80年代在内蒙古白云鄂博开铁矿的时候。
Taking an iron mine as example, the burden principles and methods for making the microcrystal glass from tailings and waste rock are described.
以某铁矿为例，阐述了利用尾矿废石制作微晶玻璃的配料原则和配料方法。
The geophysicists went on to conduct a second test in an abandoned copper mine in Arizona, using 25 iron plates spaced at various intervals in tunnels up to 45 metres below ground.
地球物理学家又在亚利桑那州一个废弃的铜矿矿井进行了第二次试验，他们将25块铁板有间隔的放置在地下45米出的坑道中。
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