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crack-through : 28 phrases in 13 subjects |
| Astronautics | 1 |
| Aviation | 1 |
| Bridge construction | 2 |
| Caspian | 2 |
| Electronics | 3 |
| Energy industry | 1 |
| General | 7 |
| Makarov | 2 |
| Metallurgy | 1 |
| Military | 1 |
| Nanotechnology | 1 |
| Oil / petroleum | 1 |
| Technology | 5 |