 |
| circulation system: 86 phrases in 33 subjects |
| Aerohydrodynamics | 2 |
| Architecture | 1 |
| Armored vehicles | 2 |
| Astronautics | 1 |
| Automobiles | 1 |
| Construction | 11 |
| Electrical engineering | 1 |
| Electronics | 5 |
| Energy industry | 5 |
| General | 1 |
| Heating | 1 |
| Jewelry | 1 |
| Law | 1 |
| Librarianship | 1 |
| Makarov | 1 |
| Medical | 2 |
| Military | 1 |
| Nautical | 1 |
| Navigation | 2 |
| Nuclear physics | 3 |
| Occupational health & safety | 1 |
| Oil / petroleum | 3 |
| Oil and gas | 6 |
| Oil and gas technology | 1 |
| Oilfields | 3 |
| Physics | 2 |
| Production | 1 |
| Public utilities | 1 |
| Refrigeration | 10 |
| Sakhalin | 3 |
| Solar power | 4 |
| Technology | 6 |
| Thermal engineering | 1 |