 |
| |||
| 门动信号; 自动信号机; 自动式信号 | |||
| 自动信号 | |||
| |||
| 自动信号发送，传输 | |||
|
automatic signal : 44 phrases in 13 subjects |
| Air defense | 2 |
| Aviation | 2 |
| Communications | 3 |
| Electronics | 3 |
| Exhibitions | 1 |
| General | 1 |
| Geophysics | 1 |
| Hydroelectric power stations | 1 |
| Military | 1 |
| Rail transport | 1 |
| Shipbuilding | 1 |
| Technology | 26 |
| Transport | 1 |