 |
| |||
| separation signal | |||
| сигнал на разделение: 16 phrases in 4 subjects |
| Electronics | 1 |
| Information security and data protection | 1 |
| Mass media | 10 |
| Security systems | 4 |
|
| |||
| separation signal | |||
| сигнал на разделение: 16 phrases in 4 subjects |
| Electronics | 1 |
| Information security and data protection | 1 |
| Mass media | 10 |
| Security systems | 4 |