 |
| traffic-control signal: 10 phrases in 7 subjects |
| Automobiles | 1 |
| Construction | 1 |
| Electronics | 1 |
| Firefighting and fire-control systems | 1 |
| Military | 3 |
| Road traffic | 1 |
| Technology | 2 |
|
| traffic-control signal: 10 phrases in 7 subjects |
| Automobiles | 1 |
| Construction | 1 |
| Electronics | 1 |
| Firefighting and fire-control systems | 1 |
| Military | 3 |
| Road traffic | 1 |
| Technology | 2 |