| |||
track infrared system | |||
infrared tracking | |||
infrared follow-up device; infrared track system; infrared tracking system | |||
| |||
trace infrared system |
红外 跟踪系统 : 20 phrases in 7 subjects |
Air defense | 3 |
Aviation | 3 |
Earth sciences | 1 |
Electronics | 2 |
Missiles | 1 |
Space | 8 |
Technology | 2 |