1.
tension-control cylinder
控制钻头给进的液压缸
2.
Hild differential drive
赫氏钻头给进差动装置
3.
Research on Hydraulic Feed System for PDC Test Equipment
PDC钻头试验装置进给液压系统研究
4.
easing the bit in
钻头轻压慢转钻进地层
5.
Analysis Study on Feeding System of All-hydraulic Power Head Type Drill Rig;
全液压动力头式钻机给进系统的分析研究
6.
4.14 Drilling with cone (drag) bit in the section.
此段地层采用牙轮（刮刀）钻头钻进。
7.
Improvement of Drill Point Geometry for Drilling High Manganese Steel ZGMn13;
钻削高锰钢ZGMn13钻头刃形改进研究
8.
Parameter Measurement and Transmission of the Drill Bit for Horizontal Directional Drilling
水平定向钻进钻头信息的测量与传输
9.
Study on drill bit for large diameter core drilling of deep hole in hard rock
硬岩深孔大口径取芯钻进的钻头研究
10.
Application of Bit Water Way in HDD
水平定向钻进扩孔钻头水口应用分析
11.
Design and Improvement of Back Reamer in Directional Drilling Non-excavation Pipe Laying Construction
导向钻进非开挖铺管施工扩回钻头的设计改进
12.
unit-type drill head
组合钻床钻头, 标准钻头
13.
Drilling is performed with a rotating tool called a drill.
钻孔是用一个称为“钻头”的旋转刀具进行的。
14.
In a minute Jimmy's pet drill was biting smoothly into the steel door.
不一会儿，吉米心爱的钻头已顺利钻进了钢门。
15.
In a minute Jimmy's pet drell was biting smoothly into the steel door.
不一会儿，吉来心爱的钻头已顺利钻进了钢门。
16.
STUDY ON THE NEW METHOD OF DRILLING CONTROL OF IMPREGNATED DIAMOND BIT
孕镶金刚石钻头钻进控制新方法的研究
17.
Research on Bit for Efficient Drilling of Gas Drainage Borehole in Nantong Mining Area;
南桐矿区瓦斯抽放孔快速钻进钻头的研究
18.
Research on Bionic Coupling Diamond Coring Bits in Drilling Hard Rock
硬岩钻进用仿生耦合金刚石取心钻头研究