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free period |
свободный период : 29 phrases in 13 subjects |
Acoustics | 1 |
Astronautics | 1 |
Automobiles | 1 |
Electronics | 2 |
Geophysics | 2 |
Hydraulic engineering | 1 |
Insurance | 5 |
Makarov | 4 |
Mass media | 1 |
Nautical | 7 |
Oil / petroleum | 1 |
Seismology | 1 |
Technology | 2 |