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pulse jet: 30 phrases in 12 subjects |
Aerohydrodynamics | 2 |
Astronautics | 3 |
Aviation | 4 |
Construction | 2 |
Energy industry | 6 |
Gyroscopes | 1 |
Mass media | 1 |
Military | 1 |
Missiles | 1 |
Natural resourses and wildlife conservation | 1 |
Security systems | 1 |
Technology | 7 |