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天体 : 446 phrases in 22 subjects |
Aerodynamics | 4 |
Antennas and waveguides | 4 |
Artillery | 1 |
Astronautics | 6 |
Astronomy | 41 |
Aviation | 4 |
Business | 1 |
Chemistry | 1 |
Ecology | 1 |
Education | 1 |
Electronics | 3 |
General | 150 |
Geology | 5 |
Medical | 18 |
Metallurgy | 2 |
Military | 9 |
Nautical | 3 |
Oil / petroleum | 4 |
Oil and gas | 1 |
Oil processing plants | 5 |
Oilfields | 3 |
Technology | 179 |