| 1. | Blasting with small changes inserted into holes drilled into a stump is a considerably milder method .
在树桩里打眼，并装填少量炸药进行爆破，是另一种稳妥得多的方法。 |
| 2. | Hydraulic tap hole drill with folding rotary mechanism
转臂折叠式全液压开铁口机 |
| 3. | Practice of treating rock wall toe with down - the - hole drill
空压机的节能降耗实践 |
| 4. | Model swdb 120 mono - body hydraulic down - the - hole drill
120型一体化液压潜孔钻机 |
| 5. | Motor used in electric bolt - hole drill for coal mine
煤矿用电动锚杆钻机电动机 |
| 6. | The transform of dry dusting system of down - the - hole drill
潜孔钻机干式除尘系统改造 |
| 7. | Design of the usual equipment of vane hole drilling
叶片钻孔通用工装的设计 |
| 8. | Application example of deflecting technique in small - hole drilling
小径偏斜技术应用实例 |
| 9. | Model kqy90 hydro - pneumatic down hole drill rig
90型气液联动潜孔钻机 |
| 10. | Taper pin hole drills with morse taper shank
莫氏锥柄的锥形销孔钻头 |
