Railways. The distance beyond a signal that must be unoccupied before an engine is allowed to approach it from the previous signal.
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| 单词 | θ202700 |
| 释义 | society > travel > rail travel > railway system or organization > [noun] > types of signal system > unoccupied distance beyond signal (1) overlap1925 Railways. The distance beyond a signal that must be unoccupied before an engine is allowed to approach it from the previous signal. |
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