| 1. | The improvement of ky - 150 type rotary drill travel unit
150型牙轮钻机行走部改造 |
| 2. | Rotary drill rod used for coal mining roofbolter
煤矿锚杆钻机用回转钻杆 |
| 3. | Prevention and treatment of bury drills during rotary drilling
旋挖钻进埋钻事故的处理实例及预防措施 |
| 4. | Hydraulic system design and analysis for hydraulic rotary drilling rig
全液压旋挖钻机液压系统设计与分析 |
| 5. | Analysis of energy for rotary drilling in weathered granite formation
风化花岗岩地层旋转钻进中的能量分析 |
| 6. | Developing tendency of hydraulic rotary drill and raise boring machine
液压旋转式钻机与反井钻机的发展趋势 |
| 7. | The mast assem - bly supports the rotary drill head and its hoisting mechanism
支架组件支持转动钻头及其提升机构。 |
| 8. | Design features and characteristics of automatic steerable rotary drilling
美国自动旋转导向钻井工具结构原理及特点 |
| 9. | Specification for rotary drill rods and tungsten carbide tipped rotary drill bits
旋转钻杆与碳化钨硬质合金旋转钻头规范 |
| 10. | Design features and characteristics of automatic steerable rotary drilling tools
美国自动旋转导向钻井工具结构原理及特点 |
