 |
| |||
| dual channel | |||
| duplex channel | |||
| tandem passage | |||
| двойной канал: 25 phrases in 12 subjects |
| Agrochemistry | 1 |
| Astronautics | 2 |
| Computers | 2 |
| Drilling | 1 |
| Electronics | 4 |
| Information security and data protection | 1 |
| Makarov | 2 |
| Mass media | 4 |
| Mathematics | 1 |
| Medical appliances | 1 |
| Programming | 4 |
| Telecommunications | 2 |