spectrogram : 37 phrases in 14 subjects |
Aviation | 1 |
Aviation medicine | 2 |
Biology | 1 |
Electronics | 2 |
Geophysics | 4 |
Makarov | 1 |
Mass media | 2 |
Mathematics | 1 |
Medical appliances | 2 |
Metallurgy | 1 |
Physics | 1 |
Polygraphy | 1 |
Security systems | 1 |
Technology | 17 |