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| тяга в вакууме; тяга в пустоте | |||
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poussée vide : 25 phrases in 10 subjects |
| Antennas and waveguides | 1 |
| Aviation | 4 |
| Electronics | 1 |
| Hydraulic engineering | 1 |
| Mechanic engineering | 3 |
| Medical appliances | 2 |
| Metallurgy | 4 |
| Radio | 2 |
| Technology | 6 |
| Welding | 1 |
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