有经验的钻石矿工能立刻把钻石分辨出来，但也有一些人会带着一块不同寻常的圆石，直到好几个星期后才发现他们得到的是块钻石。
Experienced diamond miners can tell a diamond immediately. But some people have carried around an unusual pebble for weeks before finding out that they had got a diamond.
在珠瓦纳钻石矿的女矿工。
在斯里兰卡宝石矿井中，矿工依靠微弱的烛光进行采矿工作。
对青海省天青石矿的资源特点、选矿工艺的设计、效益估算及有待进一步研究的问题进行了综合论述。
The resource features, the design of the beneficiation process, the benefit estimation of Qinghai celestite ores and the problems to be further studied were described comprehensively.
介绍了浙江萤石矿产资源的特点、开发利用现状及浙江省冶金研究所在萤石选矿工艺研究方面的进展。
The paper introduces the features, present development station of flourite resources in Zhejiang Province, and the progress on flourite processing research of Zhejiang Institute of Metallurgy.
介绍了某钾长石矿石的选矿工艺研究。
This paper introduces some results of investigation on the processing technology for a certain potash feldspar ore.
介绍了某钾长石矿石的选矿工艺研究。
This paper introduces some results of investigation on the processing technology for a certain potash feldspar ore.
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