| 1. | Effective way for the survival and development of old mines
老矿山生存与发展的有效途径 |
| 2. | More than60 pits in old mining areas are being extended
老矿区的六十多个矿井正在扩建。 |
| 3. | Optimization of ventilation system in old mine
衰老矿井通风系统的优化 |
| 4. | You ' ll come to an old mining trail
你们会走到一条采矿的小路 |
| 5. | You ' ll come to an old mining trail
你们会走到一条采矿的小路 |
| 6. | Review and consideration on strategic administration for ore prospecting in old mine
老矿山找矿战略管理的回顾与思考 |
| 7. | Determination of rational roof hole position in b11 winning face in huainan old mining area
11回采面顶板钻孔合理位置确定 |
| 8. | The companysaid it was from the old mine shafts in these mountains around them
公司说是来自于附近山里的老矿井里的钻轴 |
| 9. | The companysaid it was from the old mine shafts in these mountains around them
公司说是来自于附近山里的老矿井里的钻轴 |
| 10. | Application of comprehensive fire prevention and control technique in second mining of old mine
综合防灭火技术在老窑复采中的应用 |
