long wall
| mining method
| long wall | |
| eng.geol. | 长壁工作面; 长壁开采法 |
| mining method | |
| eng.geol. | 矿山法 |
| railw. од. | 矿山法 |
| |||
| 长壁工作面; 长壁开采法 | |||
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long wall : 4 phrases in 3 subjects |
| Business | 1 |
| Metallurgy | 1 |
| Technology | 2 |