| |||
evaluation flight; probe | |||
test mission; protoflight | |||
experiment flight | |||
experimental flight; experimental operation |
экспериментальный полёт: 25 phrases in 6 subjects |
Aerohydrodynamics | 1 |
Apollo-Soyuz | 1 |
Astronautics | 7 |
Aviation | 3 |
Military | 12 |
Missiles | 1 |