1.
A Technical Investigation on Drilling in Australia and the Technical Service of Wire-line Coring Percussive-rotary Drilling
澳大利亚钻探技术考察与绳索取心冲击回转钻进技术服务
2.
Structural Design and Mechanism Study on Water-saving Rotary Percussive Devices;
节水型回转冲击钻具结构设计与钻进机理研究
3.
The Development of CHF-20 Percussive-Rotary Reverse-circulation Drill;
CHF-20型冲击—回转反循环工程钻机的研制
4.
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
5.
Experiment and Analysis Study on Percussion Device of CHF-20 Percussion and Rotary Reverse Circulation Drilling Rig;
CHF-20型冲击-回转反循环工程钻机冲击机构试验及分析研究
6.
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
7.
Diamond drilling replaced percussion drilling.
金钻探取代了冲击钻探。
8.
The Research of Portable and Quick Vibration Impact Sampling Equipment and Drilling Technology;
轻便快速振动冲击取样机具与钻进工艺的研究
9.
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
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.
easing the bit in
钻头轻压慢转钻进地层
18.
Model Analysis on Electro-hydraulic Proportional Control for Rotary Drilling System of Engineering Geological Drilling Rig
工程地质钻机回转钻进比例控制系统的模拟分析