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| back hole | |||
| верхній: 173 phrases in 40 subjects |
| Aerodynamics | 1 |
| American usage, not spelling | 1 |
| Anatomy | 2 |
| Architecture | 2 |
| Archiving | 2 |
| Astronautics | 4 |
| Audit | 4 |
| Automobiles | 1 |
| Aviation | 12 |
| Chemistry | 2 |
| Cinematography | 1 |
| Computers | 3 |
| Diplomacy | 3 |
| Economy | 4 |
| Electronics | 1 |
| Energy industry | 1 |
| Entomology | 1 |
| Environment | 2 |
| Finances | 2 |
| General | 31 |
| Geology | 3 |
| Historical | 1 |
| Hydraulic engineering | 1 |
| Informal | 1 |
| Information technology | 15 |
| International trade | 1 |
| Law | 8 |
| Marketing | 1 |
| Mathematics | 2 |
| Mechanics | 1 |
| Military | 18 |
| Mining | 1 |
| Music | 1 |
| Nautical | 3 |
| Oil and gas | 27 |
| Rail transport | 1 |
| Seismology | 1 |
| Technology | 5 |
| Transport | 1 |
| Wind Energy | 1 |