 |
| ring groove: 89 phrases in 16 subjects |
| Armored vehicles | 5 |
| Automated equipment | 3 |
| Automobiles | 14 |
| Aviation | 3 |
| Construction | 1 |
| General | 1 |
| Makarov | 12 |
| Nautical | 1 |
| Oil / petroleum | 1 |
| Oil and gas | 2 |
| Oil and gas technology | 1 |
| Rail transport | 2 |
| Technology | 34 |
| Transport | 7 |
| Well control | 1 |
| Wood processing | 1 |