| |||
звуковой сигнал (Andrey Truhachev) | |||
оповещательный сигнал (oleg.vigodsky) |
signal tone: 24 phrases in 9 subjects |
Communications | 3 |
General | 1 |
Mass media | 6 |
Measuring instruments | 1 |
Nanotechnology | 1 |
Programming | 2 |
Rail transport | 1 |
Technology | 4 |
Telecommunications | 5 |