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channel switching: 54 phrases in 14 subjects |
Astronautics | 2 |
Chemistry | 1 |
Computer networks | 2 |
Computers | 10 |
Electronics | 2 |
Information technology | 8 |
Makarov | 2 |
Military | 5 |
Music | 2 |
Security systems | 2 |
Technology | 4 |
Telecommunications | 12 |
Telephony | 1 |
Television | 1 |