| 1. | Contact stress analysis on the bearing of single - cone bits
单牙轮钻头轴承接触应力分析 |
| 2. | The computer simulation model study of singular one - cone bit
异形牙轮单牙轮钻头的计算机仿真模型研究 |
| 3. | Study on pz modular roller - cone bit and rock drilling technology
系列组合牙轮钻头及其嵌岩技术的研究 |
| 4. | Analysis of the factors of the cutting efficiency about single - cone bit
影响单牙轮钻头切削效率的原因分析 |
| 5. | High speed journal seal of cone bit design and finite element method analyze
高速牙轮钻头轴承密封副设计与有限元分析 |
| 6. | Application of hall sensor in speed - regulation system of rotary three - cone bit drill
霍尔传感器在牙轮钻机调速系统中的应用 |
| 7. | Insert cone bit
锥孔钎头 |
| 8. | Therefore , we should not neglect the study and improvement for the service life of bearing while researching cone bits
因此，在研究钻头的同时，决不可忽视对轴承寿命的研究和改进。 |
| 9. | The application of the diamond and the hard alloy composite repair welding in strengthening the surface of the steel tooth rooler cone bit
金刚石和硬质合金复合堆焊在钢齿钻头齿面强化中的应用 |
| 10. | But now the use of the spherical one - cone bit shows that the teeth are abrade heavily in advance , which affects the velocity and life of the bit
但是目前油田上使用的球形单牙轮钻头由于牙齿先期磨损严重，影响了钻头的机械钻速和寿命。 |
