Letseng is one of the most productive mines in history — four of the world's 20 largest rough diamonds have been found at the mine, including the three largest found this century.
莱特森矿是历史上产量最高的钻石矿之一。目前全球20颗最大的原钻中有四颗产自这里，其中有三颗发现于本世纪。
Needless to say, the farm the first farmer had sold, so that he could search for a diamond mine, turned out to be the most productive diamond mine on the entire African continent.
不必说，第一个农民为了搜寻钻矿而卖掉的农场结果却是整个非洲大陆上最多产的钻矿。
Mine hoist is the throat and life lines of mine. That its performance is safety or not will not only effect the productive efficiency but also bring some serious societal impact.
矿井提升机是矿山的咽喉和命脉，它的性能安全与否，不但直接影响生产效率，而且还会带来一些重大的社会影响。
The evaluation of unreclaimed land productive potential in surface coal mine are keys for promulgating land reclamation planning in the mine.
露天煤矿待复垦土地生产潜力评价是编制土地复垦规划的一个重要内容。
Introduce operation instructions, peculiarity of structure, procedure of development, productive benefit, market trends, developing foreground of submersible motor pump used in coal mine, etc.
叙述了煤矿用潜水电泵的使用要求、结构特点、研制程序、生产效益、市场动态和发展前景等。
After entering deep mining in Fujia mine, the orebody becomed small, stope layer transition increased, and productive capacity decreased.
富家矿转入深部开采以后，矿体变小，采场转层次数频繁，生产能力降低。
With the development of science and technology, most productive use of integrated mechanized mining methods mine.
随着科技的进步，大多高产矿井使用综合机械化采煤方法。
With the development of science and technology, most productive use of integrated mechanized mining methods mine.
随着科技的进步，大多高产矿井使用综合机械化采煤方法。
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