| |||
| 继电器联锁信号箱 | |||
|
relay interlocking : 41 phrases in 7 subjects |
| Communications | 9 |
| Construction | 1 |
| Electric machinery | 1 |
| Electronics | 2 |
| Oil / petroleum | 1 |
| Rail transport | 4 |
| Technology | 23 |
| |||
| 继电器联锁信号箱 | |||
|
relay interlocking : 41 phrases in 7 subjects |
| Communications | 9 |
| Construction | 1 |
| Electric machinery | 1 |
| Electronics | 2 |
| Oil / petroleum | 1 |
| Rail transport | 4 |
| Technology | 23 |