 |
| |||
| benching; stepped excavation | |||
| bench stoping; stoping | |||
|
exploitation par gradins : 15 do fraz, 3 tematyki |
| Hutnictwo | 3 |
| Pospolicie | 1 |
| Węgiel | 11 |
|
| |||
| benching; stepped excavation | |||
| bench stoping; stoping | |||
|
exploitation par gradins : 15 do fraz, 3 tematyki |
| Hutnictwo | 3 |
| Pospolicie | 1 |
| Węgiel | 11 |