1.
The Experimental Study of Screw Pilot Hole Placement in Lower Cervical Pedicle Using the Safety Drill;
安全钻头制备下颈椎椎弓根螺钉植入孔道的实验研究
2.
unit-type drill head
组合钻床钻头, 标准钻头
3.
Safety of disc brake automatic driller system
钻机盘式刹车自动送钻中的安全性研究
4.
Determination of Safe Window of Drilling Fluid Density for Deepwater Drilling
深水钻井安全钻井液密度窗口确定方法研究
5.
Research on Optimization Design for Power Unit of Full-Driller
全液压车载钻机动力头优化设计研究
6.
Analysis of characteristics of PDC rock bits applied to the hard rock
适用于硬岩的PDC全面钻头特点分析
7.
Special Body for Inspection and Security of Diamonds
钻石检查和安全特别机构
8.
The Safety Protection Function of Disc Brake on Oil Drilling Rig
石油钻机用盘式刹车的安全保护功能
9.
The Research of Secure Drilling Fluid's Window in Hailaer Oilfield;
海拉尔地区安全钻井液密度窗口研究
10.
Remote safety monitoring system of oil drilling rig
基于GPRS的石油钻机远程安全监控系统
11.
Structure security analysis of cuttings falling-prevention tool for gas drilling
气体钻井防沉屑工具结构安全性分析
12.
Research into Safe Drilling Technology in Formations Abnormal Pressure in Da'an Area
大安地区异常压力地层安全钻井技术研究
13.
drill(ing) head
钻头; 主轴头; 钻床床头箱; 钻削动力头;钻头头部, 钎头
14.
GP shear-out safety joint
砾石充填剪切安全接头
15.
oil-sealed jar safety joint
油封式震击器安全接头
16.
hexagonal safety set screw
六角头安全固定螺钉
17.
shear pin safety joint
剪切销钉式安全接头
18.
shear pin tubing safety joint
剪切销式油管安全接头