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单词
block signal
释义
block signal
n.
(名词)
A fixed signal at the entrance to a railroad block, indicating whether or not trains may enter.
火车行止信号:火车站入口处,指示火车是否可以进站的固定信号
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gravelling
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gravel–blind
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graven image
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更新时间:2026/7/30 3:01:08