 |
| rock types: 26 phrases in 12 subjects |
| Aviation | 1 |
| Construction | 1 |
| Drilling | 2 |
| Electronics | 1 |
| Geology | 4 |
| Gold mining | 4 |
| Makarov | 1 |
| Mining | 1 |
| Oil / petroleum | 3 |
| Oilfields | 2 |
| Petrography | 1 |
| Technology | 5 |
|
| rock types: 26 phrases in 12 subjects |
| Aviation | 1 |
| Construction | 1 |
| Drilling | 2 |
| Electronics | 1 |
| Geology | 4 |
| Gold mining | 4 |
| Makarov | 1 |
| Mining | 1 |
| Oil / petroleum | 3 |
| Oilfields | 2 |
| Petrography | 1 |
| Technology | 5 |