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| |||
| drifting (MichaelBurov); driving (MichaelBurov); development (MichaelBurov); road-heading (MichaelBurov) | |||
| drivage; headwork; narrow work; sinking operations (при проходке ствола шахты); operation sinking operations (при проходке ствола шахты); head work | |||
| проходческие работы: 6 phrases in 4 subjects |
| General | 1 |
| Gold mining | 2 |
| Military | 2 |
| Mining | 1 |