1.
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
2.
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
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.
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
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.
The guerrillas dived into the thick forest and soon disappeared.
游击队员突然钻进密林，很快就消失了。
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.
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
10.
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
11.
hand churn drill
手动钢绳冲击式钻机
12.
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。
13.
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
14.
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
15.
APPLICATION OF BIG BORE REVERSE-CIRCULATION CORING CABLE DRILLING TO CAVERN OF LIMESTONE
大口径冲击反循环钻进方法在岩溶地层中的应用
16.
Optimal design of impact machine for hydraulic roofbolter based on improved genetic algorithm
改进遗传算法的液压锚杆钻机冲击机构的优化设计
17.
wash-and-drive method
边冲出钻屑边打入套管钻进法
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