光纤系统 : 111 phrases in 12 subjects |
Air defense | 2 |
Aviation | 11 |
Computer networks | 3 |
Electronics | 60 |
Hydroelectric power stations | 1 |
Information technology | 5 |
Nautical | 2 |
Oil / petroleum | 1 |
Rail transport | 1 |
Space | 11 |
Technology | 9 |
Telecommunications | 5 |