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nodal : 74 phrases in 25 subjects |
| Agriculture | 2 |
| Astronomy | 2 |
| Automated equipment | 2 |
| Aviation | 1 |
| Biology | 1 |
| Cardiology | 3 |
| Chemistry | 2 |
| Construction | 3 |
| Electronics | 2 |
| Forestry | 2 |
| General | 2 |
| Geology | 1 |
| Geophysics | 1 |
| Hydraulic engineering | 1 |
| Information technology | 2 |
| Mathematics | 6 |
| Mechanics | 1 |
| Medical | 16 |
| Meteorology | 4 |
| Natural resourses and wildlife conservation | 1 |
| Nuclear physics | 1 |
| Physics | 3 |
| Radio | 1 |
| Surveying | 5 |
| Technology | 9 |