 |
| ground signal: 37 phrases in 14 subjects |
| Astronautics | 1 |
| Automobiles | 1 |
| Aviation | 5 |
| Communications | 3 |
| Computer networks | 2 |
| Electronics | 4 |
| Information technology | 2 |
| Mass media | 1 |
| Metrology | 1 |
| Military | 7 |
| Navigation | 1 |
| Radio | 1 |
| Technology | 7 |
| Telecommunications | 1 |
|
| ground signal: 37 phrases in 14 subjects |
| Astronautics | 1 |
| Automobiles | 1 |
| Aviation | 5 |
| Communications | 3 |
| Computer networks | 2 |
| Electronics | 4 |
| Information technology | 2 |
| Mass media | 1 |
| Metrology | 1 |
| Military | 7 |
| Navigation | 1 |
| Radio | 1 |
| Technology | 7 |
| Telecommunications | 1 |