1.
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
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.
Research on Load Self-adapting of Rotating System in Measuring Drill
随钻测量钻机回转系统负载自适应研究
4.
Modeling and Simulation of Rotating Hydraulic System in Down-the-Hole Drill
潜孔钻机回转液压系统的建模与仿真
5.
Contact Analysis of Gear Transmission in Rotating Reducer of Blasthole Drills based on ANSYS
基于ANSYS的牙轮钻机回转机构齿轮接触分析
6.
kelly for well-drilling machiens
旋转钻孔,钻井机用
7.
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
8.
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
9.
Researches on Rotary Machine of Drilling and Grinding Carbon Fiber Reinforce Composite Component;
回转类碳纤维复合材料构件钻磨机床的研究
10.
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
11.
Application of the Positive Cycle Mechanical Rotary Boring Grout Pile on the Pile Construction of the Pebble Bed
正循环机械回转钻孔灌注桩在卵石层中的应用
12.
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
13.
auger backfiller
万能螺旋钻式回填机
14.
A device, such as a drill, that operates with a jerking or jolting motion.
振动器，推拉器一种像钻孔机的设备，运转时来回拉动和推动
15.
Research on Rotary Positioning System of the Rotary Drill Rig with Load-sensing Properties
具有负载敏感特性的旋挖钻机回转定位系统的研究
16.
Dynamic simulation and experiment study about the rotating hydraulic system of down-the-hole drill based on AMEsim
采用AMEsim的潜孔钻机回转液压系统的动态仿真与试验研究
17.
engine ,drill, dental, with swivel arm
牙科钻机,带旋转杆
18.
great lengths of drill pipe which are rotated by an engine at the top,
钻杆顶部安装的发动机带动钻杆旋转，