1.
The optimization design and experimental research on percussion-compact step drill bit
阶梯式冲击挤密钻头结构优化设计及试验
2.
Penetration Mechanism of DTH Percussion Compact Drilling and Experimental Research on Compact Bit;
潜孔锤冲击挤密钻进机理及挤密钻头的设计与实验研究
3.
The Pore-forming Mechanism Study of Cam Bit on Percussive-Rotary Extruding DTH Drilling
凸轮型冲击回转挤压钻头成孔机理的研究
4.
Downhole drill hammers and drills
GB/T13344-1992潜孔冲击器和钻头
5.
Finite element analysis on deformation mechanism of soils under percussion-compact
冲击挤密作用下土体变形机理的有限元分析
6.
Diamond drilling replaced percussion drilling.
金钻探取代了冲击钻探。
7.
to strike, thrust or shove against, often with head or horns.
用头或角击，戳，挤。
8.
Application of Percussion Drill and Rotary Drill in the Construction of Dock Rock-socketed Oblique Piles
冲击钻机与回转钻机在码头嵌岩斜桩施工中的应用
9.
Finite Element Analysis and Test Study on Deformation Mechanics of Soils under Percussion-Compact;
冲击挤密作用下土体变形机理的有限元分析与实验研究
10.
hand churn drill
手动钢绳冲击式钻机
11.
Start collaring with reduced throttle to the impact mechanism and feeding, let the bit work its way slightly into the rock.
开孔时，应采用最小的冲击和推进力，使钻头平稳地进入岩层。
12.
The Research on Optimal Design and Dynamic Simulation for Driving Head of Valvelless Impact-Rotary Hydraulic Roofbolter;
无阀冲击旋转型液压锚杆钻机动力头优化设计与动态仿真研究
13.
Study on the Drivin of Cavity-front Constant-pressure Impact-rotary Hydraulic Roofbolter;
前腔常压式冲击旋转型液压锚杆钻机动力头的研究
14.
Transient dynamics analysis for driving head of valvelless impact-rotary hydraulic roofbolter based on MSC.PATRAN
基于MSC.PATRAN的无阀冲击旋转型液压锚杆钻机动力头瞬态动力学分析
15.
The Strength and Modal Analysis of GCF-1500 Impact Drilling Machine Tower;
GCF-1500冲击钻机钻塔强度与模态分析
16.
A Study of the Technique of Cable Drilling in Modern Time;
浅述近代冲击(顿钻)钻井工艺技术
17.
diamod-enhanced hammer bit
金刚石镶齿震击钻头
18.
Analysis and Treatment of an Accident of Blocking Bore of Excavated Hole Driven Cast-in-Place Pile by Percussion Drill
一起冲击钻成孔灌注桩卡钻事故的分析与处理