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mining operations (Alexander Demidov) | |||
mining recovery (MichaelBurov) | |||
mining practice; mining | |||
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mining works (ABelonogov) |
горное производство: 20 a las frases, 6 temas |
Construcción | 1 |
Derecho laboral | 1 |
General | 5 |
Minería | 9 |
Minería de oro | 2 |
Tecnología | 2 |