| 1. | These are useful in hard rock mining where high brisance, high shattering effects, are desired .
这种炸药，对需要高威力、高破碎效应的坚硬岩石矿，是有用的。 |
| 2. | It may be gouge of finely comminuted rock material with perhaps large blocks of the harder rocks embedded in it .
可能是磨碎的岩层物质组成的断层流，并夹杂一些大块坚硬岩石。 |
| 3. | The tunnel was excavated through solid rock
（此隧道系挖掘坚硬岩石而成。 ） |
| 4. | Blasting technique of hard rock in airshaft
新集风井坚硬岩石爆破技术 |
| 5. | Hard rock blasting technology in baiyinuo ' er lead and zinc mine
白音诺尔铅锌矿坚硬岩石爆破技术 |
| 6. | A discussion on the rational cutting types in hard - rock driving
坚硬岩石巷道掘进合理掏槽型式的探讨 |
| 7. | Numerical simulation on 9 - holes cutting mode in hard rock mass
坚硬岩石条件下九孔掏槽方式的数值模拟研究 |
| 8. | Hard to strong - hard rock
硬岩-坚硬岩石 |
| 9. | Research and application of the cutting blasting technology of roadway excavation in hard rock
坚硬岩石巷道掏槽爆破技术研究与应用 |
| 10. | Drilling and blasting technology for hard rocks in new inclined ventilation shaft of zhangxin mine
张新矿新斜风井坚硬岩石凿岩爆破技术 |
