 |
| combination system: 29 phrases in 18 subjects |
| Automated equipment | 2 |
| Automobiles | 1 |
| Caspian | 1 |
| Firefighting and fire-control systems | 1 |
| General | 1 |
| Geophysics | 1 |
| Makarov | 1 |
| Military | 1 |
| Mining | 2 |
| Nautical | 2 |
| Oil / petroleum | 4 |
| Oil and gas | 1 |
| Oil and gas technology | 2 |
| Patents | 1 |
| Programming | 1 |
| Refrigeration | 2 |
| Solar power | 1 |
| Technology | 4 |