| |||
| сигнал стандартной частоты | |||
| |||
| сигнал стандартной частоты | |||
|
standard-frequency signal : 7 phrases in 4 subjects |
| Mass media | 3 |
| Military | 1 |
| Technology | 1 |
| Telecommunications | 2 |
| |||
| сигнал стандартной частоты | |||
| |||
| сигнал стандартной частоты | |||
|
standard-frequency signal : 7 phrases in 4 subjects |
| Mass media | 3 |
| Military | 1 |
| Technology | 1 |
| Telecommunications | 2 |