1.
In drilling high angle deviated holes, friction is the main factor affecting the effective WOB.
在大斜度定向井钻井过程中，摩擦阻力是影响有效钻压的主要因素。
2.
A Brief Explanation of Air Actuated DTH Hammer Drilling Efficiency
空气潜孔锤钻进是提高钻进效率的有效途径
3.
Comparison of treatment results of arthroscopic knee debridement alone with a combination of arthroscopic debridement and drilling decompression in knee Kaschin-Beck disease
关节镜有限清理术与关节镜有限清理加钻孔减压术治疗膝大骨节病疗效对比
4.
The efficiency study of traveling hydraulic drive about the down-the-hole drill
潜孔钻机履带行驶液压驱动系统效率研究
5.
Numerical simulation of small pillar stress concentration areas borehole pressure relief effect
小煤柱应力集中区钻孔卸压效果的数值模拟
6.
Application and effects of after grouting method in drill grouting pile's construction
后压浆在冲钻孔灌注桩施工中的应用及效果
7.
Influence of prebored hole measures on compacting effects of jacked piles
预钻孔措施对静压桩挤土效应的影响分析
8.
Application Effect and the Analysis on CS14 Fully Hydraulic Driving Head Drill
CS14型全液压动力头钻机的生产应用效果及分析
9.
easing the bit in
钻头轻压慢转钻进地层
10.
a portable drill with a plate that is pressed against the chest to force the drill point into the work.
有一块可以把胸部压上来使钻头对准目标的金属板的手动钻机。
11.
Finite Element Analysis and Research on Optimum Design of Drilling Tower Joints of JYD-1000 All-hydraulic Core Drill;
JYD-1000型全液压岩芯钻机钻塔节点有限元分析及优化设计研究
12.
Good-quality material drill,effective scraps discharge and heat discharge groove.
优质材质钻体，有效的排屑散热沟槽。
13.
Study of CrAlTiN Uesed on Micro-Drill to Improve Work Effectivity;
CrAlTiN镀层对微钻使用的有效性研究
14.
The borehole must be drilled at correct place，and the gas pressure will be relieved.
没有卸不了压的瓦斯，只有打不到位的钻孔。
15.
PERTURBATION STOCHASTIC FEM ANALYSIS FOR WEIGHT ON BIT ( WOB ) FLUCTUATION OF DRILL STRING
钻压波动对轨迹影响的摄动随机有限元分析
16.
Testing Study on Mechanism and Effect of Post-grouting at the Bottom of Super Large Bored Piles Foundation;
超大型钻孔灌注桩基础桩底后压浆机理及效果的实测研究
17.
Effects of thin needle drilling decompression on 166 patients with early osteonecrosis of femoral head
细针钻孔减压术治疗早期股骨头坏死166例疗效观察
18.
As demonstrated in practice, the auger string hole straightening is the most effective.
实践证明,螺杆钻纠斜是最有效的纠斜方法。