 |
| |||
| сигнал переменного тока | |||
|
alternating-current signal : 3 phrases in 3 subjects |
| Military | 1 |
| Rail transport | 1 |
| Technology | 1 |
|
| |||
| сигнал переменного тока | |||
|
alternating-current signal : 3 phrases in 3 subjects |
| Military | 1 |
| Rail transport | 1 |
| Technology | 1 |