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| 单向闭塞系统; 单向自动闭塞; 单向自动闭塞系统; 单轨自动闭塞系统; 单轨闭塞系统 | |||
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| 单向自动闭塞 | |||
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односторонняя автоблокировка : 3 phrases in 2 subjects |
| General | 1 |
| Technology | 2 |
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