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| système de récupération | |||
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система регенерации : 12 phrases in 7 subjects |
| Astronautics | 2 |
| Aviation | 1 |
| Forestry | 3 |
| Meteorology | 1 |
| Natural resourses and wildlife conservation | 1 |
| Oil and gas technology | 1 |
| Technology | 3 |
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