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тяга в вакууме; тяга в пустоте |
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 |