 |
| operating maintenance: 43 phrases in 17 subjects |
| Advertising | 2 |
| Caspian | 1 |
| Electrical engineering | 1 |
| Energy industry | 3 |
| General | 2 |
| Information technology | 1 |
| Medical | 2 |
| Military | 8 |
| Oil / petroleum | 1 |
| Oilfields | 2 |
| Production | 1 |
| Sakhalin | 1 |
| Security systems | 2 |
| Technology | 6 |
| Telecommunications | 8 |
| Uncommon / rare | 1 |
| Weapons of mass destruction | 1 |