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in successive steps | |||
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by step | |||
in successive steps |
последовательно ступенями: 84 phrases in 10 subjects |
Astronautics | 72 |
Hydrology | 1 |
Makarov | 1 |
Mathematics | 2 |
Mechanic engineering | 1 |
Military | 1 |
Nanotechnology | 2 |
Oceanography & oceanology | 1 |
Power electronics | 1 |
Technology | 2 |