| 1. | Diamond drilling bits and diamond core bits
金刚石钻头及金刚石取心钻头 |
| 2. | Factors affecting performance of sandwich - structured diamond core bits
影响夹层式钻头性能因素的研究 |
| 3. | Diamond core bit for coal drilling
煤田钻探金刚石取心钻头 |
| 4. | Researches and applications of compound diamond core bit with sintered body
混合型金刚石烧结体取心钻头的研制及应用 |
| 5. | Run in a diamond core bit
下金刚石取芯钻头 |
| 6. | Study of electroplated thin - wall diamond core bit and its application for drilling electro - melting zirconcorundum refractory materials
薄壁金刚石钻头的研制和在电熔锆刚玉耐火材料中的应用 |
