| 1. | Deep mining first blighted the west virginia landscape .
深挖矿井首先使弗吉尼亚州的风景遭到破坏。 |
| 2. | Research on isolation material for deep mine roadway
深井煤矿巷道隔热材料研究 |
| 3. | Problems and solutions of deep mining in coal mine
煤矿深部开采可能出现的问题及对策 |
| 4. | Mine plans ; deep mining ; winning and stowage
矿山平面图.深部采矿.第2部分:开采和充填 |
| 5. | Mine plans ; deep mining ; underground workings
矿山测量平面图.地下采矿.巷道 |
| 6. | Test research on ground pressure control for deep mine roadway
深井巷道地压控制的试验研究 |
| 7. | Mine plans ; deep mining ; underground workings ; comments
矿区平面图.深井开采.井下巷道.说明 |
| 8. | The extraction of coal from these deep mines is expensive
从这些深矿中取得煤是很昂贵的。 |
| 9. | Design and application of chamber in soft rock of deep mine
深井软岩大断面硐室的设计与应用 |
| 10. | Probe into prevention of heat hazard of deep mine
深井热害防治探讨 |
