A comparative study of the thrust force at initial stages of drilling on inclined surfaces was conducted through experiments.
分析模型合理地解析了斜面钻孔初期的受力现象。
STUDY OF CONNECTIVITY OF DISCONTINUITIES OF BOREHOLE BASED ON DIGITAL BOREHOLE IMAGES
基于数字钻孔图像的结构面连通性研究
Study for Analysis Method of Rockmass Discontinuities Based on High-Resolution Digital Borehole Images;
基于高精度数字钻孔图像的岩体不连续面分析方法研究
DISCUSSION OF TECHNOLOGY FOR DISPLAYING THE BORE STRATA HISTOGRAM IN-PHASE WITH DRILL
钻进时同步显示钻孔地层柱状图技术探讨
A New Algorithm for Mineral Storage Calculation Based on Voronoi Diagram of Point-sets of Drill Holes;
基于钻孔点集Voronoi图的矿产储量新算法
The rapid drawing of borehole log with EXCEL and MAPGIS
应用EXCEL和MAPGIS快速生成地质钻孔柱状图
Bore Information Management and the Method Improvement of Auto-Generating Histogram
钻孔信息管理和柱状图成图方法的改进研究
tap(ping) drill
螺丝孔钻，螺丝底孔钻
The sorker was drilling.
此工人在用钻孔机钻孔。
The Study of Image Analysis Method Based on Digital Optiacal Borehole Imaging;
基于数字钻孔摄像的图像分析方法研究
The Design of Well Course's Computing and Drawing Software
钻井井(孔)眼轨迹计算与图形绘制软件的设计
Any of numerous hand tools for boring holes.
钻孔工具，手钻钻孔用的手持工具
"When tappings are needed at any other than the standard boss locations, a sketch must be provided clearly showing the exact location on the valve."
如果需要在上述标准以外的位置钻孔,请提供准确、清楚的设计图,标明阀体上准确的钻孔的位置。
kelly for well-drilling machiens
旋转钻孔,钻井机用
A tool used for drilling.
钻头用于钻孔的工具
boring method (of pulp sampling)
（纸浆取样）钻孔法
Drilling 50 yards deep,
钻孔至50码深处，
FIGURE 3. The eccentric bias system, which uses a contact with a backdrilled plunger, exhibits this typical resistance stability over multiple mating cycles.
图3.偏心系统，使用后钻孔顶针，显示多次配接时的典型电阻稳定性。
The Development Research of the Three-Dimensional-Visualization CAD System for Bored Pile Foundation of Bridge and Capping Beam Drawing;
三维可视化桥梁钻孔桩基础及盖梁绘图CAD系统的开发研究