 |
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| mining operations (Alexander Demidov) | |||
| mining practice; mining | |||
| mining recovery (MichaelBurov) | |||
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| mining works (ABelonogov) | |||
| горное производство: 20 phrases, 6 sujets |
| Construction | 1 |
| Droit du travail | 1 |
| Exploitation minière | 9 |
| Extraction d'extr. | 2 |
| Général | 5 |
| Technologie | 2 |