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centralizing : 46 phrases in 25 subjects |
| Aeronautics | 1 |
| Armored vehicles | 3 |
| Astronautics | 1 |
| Automobiles | 1 |
| Aviation | 1 |
| Banking | 1 |
| Business | 1 |
| Chess | 2 |
| Construction | 1 |
| Drilling | 3 |
| General | 4 |
| Gyroscopes | 1 |
| Historical | 1 |
| Logistics | 4 |
| Mass media | 1 |
| Mathematics | 1 |
| Mechanic engineering | 4 |
| Military | 2 |
| Mining | 3 |
| Missiles | 2 |
| Politics | 1 |
| Programming | 2 |
| Rail transport | 2 |
| Technology | 2 |
| Transport | 1 |