 |
| |||
| guard signal | |||
| speed OK | |||
| safety signal | |||
| 安全信号: 17 phrases in 7 subjects |
| Electronics | 4 |
| Explosives and Explosive Ordnance Disposal | 1 |
| Mechanic engineering | 1 |
| Mechanics | 1 |
| Nuclear and fusion power | 2 |
| Space | 3 |
| Technology | 5 |
|
| |||
| guard signal | |||
| speed OK | |||
| safety signal | |||
| 安全信号: 17 phrases in 7 subjects |
| Electronics | 4 |
| Explosives and Explosive Ordnance Disposal | 1 |
| Mechanic engineering | 1 |
| Mechanics | 1 |
| Nuclear and fusion power | 2 |
| Space | 3 |
| Technology | 5 |