back scattering : 99 phrases in 20 subjects |
Aerohydrodynamics | 1 |
Chemistry | 1 |
Construction | 2 |
Electrochemistry | 1 |
Electronics | 2 |
General | 1 |
Geophysics | 2 |
Makarov | 16 |
Mass media | 10 |
Medical appliances | 1 |
Metallurgy | 2 |
Nuclear physics | 6 |
Physics | 3 |
Polymers | 1 |
Radiation | 25 |
Radioengineering | 2 |
Radiography | 13 |
Radiolocation | 3 |
Road works | 1 |
Technology | 6 |