 |
| |||
| Rotary Air Blast (sometimes Rapid Advance Bore MichaelBurov); RAB (MichaelBurov); rapid advance bore (MichaelBurov) | |||
| вращающаяся воздушная струя: 7 phrases in 1 subject |
| Gold mining | 7 |
|
| |||
| Rotary Air Blast (sometimes Rapid Advance Bore MichaelBurov); RAB (MichaelBurov); rapid advance bore (MichaelBurov) | |||
| вращающаяся воздушная струя: 7 phrases in 1 subject |
| Gold mining | 7 |