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| воздушный трубопровод: 27 phrases in 16 subjects |
| Aviation | 1 |
| Construction | 4 |
| Ecology | 1 |
| Electronics | 1 |
| Energy industry | 1 |
| Firefighting and fire-control systems | 2 |
| Makarov | 1 |
| Mechanic engineering | 1 |
| Nanotechnology | 1 |
| Nautical | 1 |
| Oil and gas | 1 |
| Oil and gas technology | 1 |
| Rail transport | 2 |
| Shipbuilding | 1 |
| Technology | 6 |
| Transport | 2 |