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переменное сечение : 33 phrases in 10 subjects |
| Aviation | 6 |
| Construction | 4 |
| Hydraulic engineering | 2 |
| Mechanic engineering | 7 |
| Military | 1 |
| Mining | 4 |
| Oil and gas technology | 2 |
| Radio | 2 |
| Technology | 3 |
| Trucks/Lorries | 2 |
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