 |
| |||
| coal-mining (bookworm); mining operations; coal extraction | |||
| coal extraction | |||
| coal mining | |||
| coal output; coal production | |||
|
угледобыча : 2 do fraz, 2 tematyki |
| Geologia | 1 |
| Węgiel | 1 |
|
| |||
| coal-mining (bookworm); mining operations; coal extraction | |||
| coal extraction | |||
| coal mining | |||
| coal output; coal production | |||
|
угледобыча : 2 do fraz, 2 tematyki |
| Geologia | 1 |
| Węgiel | 1 |