...浅埋采空区多梯度电测深剖面装置-飞冠代写网 关键词：煤矿；浅埋老窑采空区；多梯度；剖面装置 [gap=742]Key words: coal mines; Shallow old kiln mined - out area; multi-gradient; profile devices ..
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... 我在家出了上网就是看电视。 » I am at home on the Internet is watching television. 选煤矿 » coal mines. 心中的日月 » With my life ...
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Safety in Coal Mines 煤矿安全 ; 端头支架在急倾斜特厚煤层综采放顶煤工作面的应用与改进 ; 煤矿应大力倡导向事故学习 ; 下保护层采煤工作面顶板走向钻孔参数的优化
Coal Mines Board 煤矿局 ; 煤矿部
Coal Mines Ltd 煤炭矿业有限公司 ; 煤矿有限公司
Coal Mines Department 煤矿管理局 ; 煤矿部
coal mines authority ltd 煤矿管理公司
bone-coal mines 长跨桥
small coal mines 小煤矿 ; 小煤窑
discover new coal mines 发现新煤矿
With the increase of demands to prevent gas calamities and to make use of gas, the research on gas deflation in coal mines will be developed fast.
随着瓦斯灾害防治和瓦斯利用问题的日益突出，煤矿瓦斯抽放和利用的研究将得到快速发展。
参考来源 - 瓦斯监控系统的研制It was vital in both theory and practice to study how to control effectively safety risk in coal mines.
因此研究如何有效地控制煤矿安全风险具有十分重要的理论和现实意义。
参考来源 - 煤矿动态安全评价及预测技术研究·2,447,543篇论文数据，部分数据来源于NoteExpress
Most of the miners were rescued from the coal mines.
大多数矿工从煤矿里被救了出来。
Some propose storing the CO2 in coal mines or liquid storage in the ocean.
一些人建议将二氧化碳储存在煤矿中，或以液体状态储存在海洋中。
That the application of new technology can increase the productivity of existing coal mines is demonstrated by the case of Tribnia's coal industry.
Tribnia 的煤炭工业证明了应用新技术可以提高现有煤矿的生产率。
And they came by the hundreds of thousands to take jobs in steel factories in Pennsylvania and the coal mines of West Virginia.
VOA: special.2010.05.20
They took jobs in the steel factories of Pennsylvania and the coal mines of West Virginia.
VOA: special.2010.05.13
Many of the coal miners in America were men from the British mines in Wales.
VOA: special.2010.05.13
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