bradding

The material used to strengthen the surface of steel tooth roller cone bit is main the grain found hard alloy, few diamdnd is used.

本文根据目前钢齿牙轮钻头齿面强化材料主要采用的是颗粒铸造硬质合金和少量金刚石的实际出发，考虑到金刚石在焊接过程中容易出现石墨化，以及焊接接头连接强度较低，硬质合金在氧—乙炔焰堆焊过程中出现严重烧损熔化，牙齿耐磨性不够高等问题。

Dynamic model of roller bit with nine degrees of freedom;

九自由度牙轮钻头动力学模型研究

Computer simulation for the side-cutting of roller bits;

牙轮钻头侧向切削的计算机仿真

Model to determine rock drillability by roller bit;

牙轮钻头可钻性级值的确定方法

Research on the simulation of the tooth slippage of the cone bit

牙轮钻头牙齿滑移量规律的仿真研究

The vertical Interaction Model of cone Bit Teeth-rock

牙轮钻头牙齿与岩石垂向互作用仿真模型

insert rock bit

镶硬合金齿牙轮钻头

Boundary element method for stress analysis of tungsten carbide insert interface on cone bit

牙轮钻头镶齿结合面应力分析的边界元法

Did he drill your tooth?

他有没有钻你的牙齿？

bridge of the bit

四牙轮钻头牙轮支架

The dentist drilled the bad bits out of a tooth

牙医把牙齿上蛀坏的部分钻掉。

a high speed drill that dentists use to cut into teeth.

牙医用来打进牙齿的高速钻机。

This paper has introduced a set of test device to examine the loads on teeth of the bit at different rotary speed and under high bit-weight.

本文介绍了一套测试装置,用以测试钻头在大钻压下任意转速的牙齿受力。

diamod-enhanced hammer bit

金刚石镶齿震击钻头

insert polycrystalline diamond bit

聚晶金刚石镶齿钻头

insert natural diamond bit

天然金刚石镶齿钻头

cross-bladed chisel bit

十字刮刀楔形齿钻头

shaped insert bit

非球形硬合金齿钻头

sintered tungsten carbide compact bit

镶碳化钨硬合金齿钻头

cone type roller bearing rock bit

滚柱轴承锥形牙轮钻头

Blast hole tricone rock bits

GB/T13343-1992矿用三牙轮钻头

Comparative analysis of drilling characteristics of dia- mond bits and roller bits

金刚石钻头与牙轮钻头钻井特点对比分析