| |||
| ★ 继电式电气集中联锁; 全部继电联锁 | |||
|
all- relay interlocking : 13 phrases in 3 subjects |
| Communications | 1 |
| Rail transport | 2 |
| Technology | 10 |
| |||
| ★ 继电式电气集中联锁; 全部继电联锁 | |||
|
all- relay interlocking : 13 phrases in 3 subjects |
| Communications | 1 |
| Rail transport | 2 |
| Technology | 10 |