But appropriate the blasting parameters of medium deep blasting in hard rock tunnel is always a technical problem need to be solved.
而合理的硬岩巷道中深孔掘进爆破参数则一直是需要研究解决的技术难题。
Hot melting is a completely new method to fracture rocks and has played a very important role in drilling medium deep and deep holes in Antarctic area.
热熔法是一种全新的碎岩方法，在南极中深孔的钻进中起了重要作用。
The Xiong'er Group volcanic distrubutive region in Huangzhuang of Songxian-Santun of Ruyang belongs to the medium deep denudation region with the intense tectonic event(disturbance).
嵩县黄庄—汝阳三屯一带熊耳群火山岩分布区属构造变动强烈的中深剥蚀区。
For porous aquifer system separated by aquitard, the precipitation recharge possesses delay effect on the medium-deep aquifers.
对于中间以弱透水层相隔的孔隙含水系统，降雨补给中深层水具有延迟作用。
Its discovery and exploitation is of importance to the drilling and utilization of geothermal water resources at medium-deep and deep crust in large inland basins such as Sichuan basin of China.
该温泉的发现与开发，对四川盆地，乃至中国其他大型内陆盆地中深部地热资源的开发利用有借鉴作用。
Its discovery and exploitation is of importance to the drilling and utilization of geothermal water resources at medium-deep and deep crust in large inland basins such as Sichuan basin of China.
该温泉的发现与开发，对四川盆地，乃至中国其他大型内陆盆地中深部地热资源的开发利用有借鉴作用。
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