| |||
signal box; signalling box | |||
indicator panel; signal chest; signal locker | |||
| |||
signal box |
信 号 箱 : 31 phrases in 10 subjects |
Aviation | 3 |
Business | 1 |
Economy | 1 |
Electronics | 16 |
Mechanic engineering | 1 |
Metallurgy | 2 |
Nautical | 2 |
Rail transport | 1 |
Space | 2 |
Technology | 2 |