 |
| chert: 40 phrases in 18 subjects |
| Armored vehicles | 1 |
| Automobiles | 1 |
| Cement | 2 |
| Construction | 1 |
| Drilling | 1 |
| Electronics | 1 |
| General | 1 |
| Geology | 7 |
| Gold mining | 5 |
| Makarov | 2 |
| Oil / petroleum | 4 |
| Oil and gas technology | 2 |
| Oilfields | 1 |
| Petrography | 1 |
| Rail transport | 1 |
| Road works | 1 |
| Silicate industry | 7 |
| Technology | 1 |