 |
| mean diameter: 51 phrases in 21 subjects |
| Analytical chemistry | 1 |
| Astronautics | 2 |
| Astronomy | 1 |
| Automated equipment | 13 |
| Combustion gas turbines | 1 |
| Electronics | 3 |
| Energy industry | 12 |
| Forestry | 1 |
| Gynecology | 1 |
| Medical | 4 |
| Medical appliances | 1 |
| Mining | 1 |
| Navigation | 1 |
| Nuclear physics | 1 |
| Obstetrics | 1 |
| Oil / petroleum | 1 |
| Oil processing plants | 1 |
| Pharmacy and pharmacology | 1 |
| Physical chemistry | 1 |
| Polymers | 1 |
| Water resources | 2 |