Test research of drilling force for XYZ series rock bit;
XYZ系列岩石钻头钻削力试验研究
diagonal cut rock drill plus bits
对角十字形岩石钻头
rock-bit interaction model
岩石-钻头互作用模式
rock-bit interaction
岩石与钻头互相作用
A needle-shaped drill for boring holes in rock or masonry.
钻头，钻石器，钻孔器用于在岩石或砖石上钻孔的针形钻
Any of various mollusks that bore into soft rock or wood.
钻蛀虫钻入松软岩石或木头中的软体动物
Research on Bionic Coupling Diamond Coring Bits in Drilling Hard Rock
硬岩钻进用仿生耦合金刚石取心钻头研究
This drill can bore through rock.
这台钻机能钻透岩石.
It cuts a clean cylinder of rock,
这种钻头能切割一段光滑的圆柱形岩石，
The vertical Interaction Model of cone Bit Teeth-rock
牙轮钻头牙齿与岩石垂向互作用仿真模型
The Research of the Longitudinal Vibration in Cone Bits-rock System;
牙轮钻头与岩石互作用下系统纵向振动研究
Study on Electroplated Diamond Bit for Extra-hard, Compact and Weak-abrasiveness Formation;
坚硬致密弱研磨性岩层电镀金刚石钻头研究
Development of the software on the diamond bit type selection according to formation rock property
根据地层岩性进行金刚石钻头选型的软件开发
Rock crushing simulation and cutting bit optimum design based on fracture and damage mechanics
基于断裂损伤的岩石破碎模拟与钻头优化设计
Interaction Model between Formation and Bit during the Elliptic Distribution of Rock Drillability
岩石可钻性呈椭球型分布时地层与钻头相互作用模型
Study on Nonlinear Dynamics Action of Integrated Bit-Rock-Drillstring-Well System;
钻头—岩石—钻柱—井壁互作用下系统耦合非线性动力学研究
Research and Application of Diamond-impregnated PDC Bit or Drilling in Medium Hard Rock Formation
中硬岩层钻进孕镶金刚石复合片钻头的研究与应用
marine bivalve that bores into rock or clay or wood by means of saw-like shells.
用它锯一样的壳在岩石、泥土或木头中钻洞的海生双壳类动物。
Diamond core drilling equipment conventional system
GB/T16950-1997金刚石岩心钻探钻具设备