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| mining operations (Alexander Demidov) | |||
| mining practice; mining | |||
| mining recovery (MichaelBurov) | |||
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| mining works (ABelonogov) | |||
| горное производство: 20 do fraz, 6 tematyki |
| Budownictwo | 1 |
| Górnictwo | 9 |
| Pospolicie | 5 |
| Prawo pracy | 1 |
| Technika i technologia | 2 |
| Wydobywanie złota | 2 |