We have studied synthetically the tectonic stress field in the Three Gorges and its adjacent area by use of data of crustal deformation, focal mechanism and borehole stress observation.
利用地形变测量、震源机制和钻孔应力测量等资料，综合研究了三峡及邻区的构造应力场。
Microfossil analysis reveals three transgression layers in the CQJ4 borehole, which are at 4.
微体生物分析显示该孔岩芯记录了三个海侵层，分别位于4。
In order to appraise the quality testing of grout curtain, digital borehole camera technology is applied to three boreholes of the grouting gallery no. 3 in Xiaolangdi Water Control Project.
为了评价帷幕灌浆效果，将数字钻孔摄像技术应用到小浪底水利枢纽3号灌浆洞3个灌浆质量检查孔中。
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