 |
| |||
| bord-and-pillar mining; room and pillar mining; room-and-pillar mining | |||
| board-and-pillar mining; pillar method | |||
| room and pillar mining (угля) | |||
| камерно-столбовая разработка: 58 短语, 5 学科 |
| 地质学 | 1 |
| 技术 | 6 |
| 油和气 | 1 |
| 矿业 | 48 |
| 黄金开采 | 2 |
|
| |||
| bord-and-pillar mining; room and pillar mining; room-and-pillar mining | |||
| board-and-pillar mining; pillar method | |||
| room and pillar mining (угля) | |||
| камерно-столбовая разработка: 58 短语, 5 学科 |
| 地质学 | 1 |
| 技术 | 6 |
| 油和气 | 1 |
| 矿业 | 48 |
| 黄金开采 | 2 |