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свободный индекс | |||
бесплатный номер (oleg.vigodsky) |
free number: 24 phrases in 12 subjects |
Aerohydrodynamics | 2 |
Astronautics | 1 |
Aviation | 2 |
Electronics | 1 |
General | 2 |
Makarov | 1 |
Mass media | 3 |
Mathematics | 2 |
Nanotechnology | 3 |
Technology | 1 |
Telecommunications | 2 |
Telephony | 4 |