| |||
redundant signal | |||
counter signal | |||
auxiliary signal; optional alarm | |||
| |||
additional echoes (Ying) |
дополнительный сигнал : 52 phrases in 10 subjects |
Automobiles | 23 |
Firefighting and fire-control systems | 1 |
Makarov | 1 |
Mass media | 16 |
Nautical | 1 |
Radio | 1 |
Refrigeration | 1 |
Technology | 4 |
Telecommunications | 3 |
Transport | 1 |