Resonant modes and their application in calculation of acoustic fields of boreholes in layered media
井孔声场的本征模及其在分层介质井孔声场计算中的应用
Stability of Boreholes in a Geologic Medium Including the Effects of Anisotropy.
包括各向异性效应在内的地球介质中井孔的稳定性
Quality control techniques in the construction of bored concrete piles through long auger boreholes
长螺旋钻孔压灌砼桩施工质量控制技术
If they carry on sinking boreholes then the land is likely to subside.
如果他们继续钻洞，地表很有可能下沉。
Design of Gas Release Boreholes for Exposing Coal Seams in a Crosscut
石门揭煤瓦斯卸压钻孔设计
The correctness of the result was proved by some underground boreholes.
经过少量的井下钻孔验证，证实了结果的正确性。
The above stated method was successfully applied to23 large diameter gas drainage boreholes.
采用上述方法已经成功施工23口大口径瓦斯抽排钻孔。
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