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reference center : 32 phrases in 20 subjects |
| Astronautics | 1 |
| Automated equipment | 1 |
| Cartography | 1 |
| Ecology | 1 |
| Gear train | 2 |
| General | 5 |
| Genetics | 1 |
| Information technology | 1 |
| Jet engines | 1 |
| Machinery and mechanisms | 3 |
| Mass media | 1 |
| Medical | 3 |
| Military | 3 |
| Name of organization | 2 |
| Navigation | 1 |
| Non-destructive testing | 1 |
| Occupational health & safety | 1 |
| Optics branch of physics | 1 |
| Soviet | 1 |
| Water supply | 1 |