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| 单线闭塞系统; 单线自动闭塞; 单纯自动闭塞系统; 单轨自动闭塞系统; 单轨闭塞系统 | |||
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однопутная автоблокировка : 5 phrases in 2 subjects |
| General | 1 |
| Technology | 4 |
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