英语词汇“block signal”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

单词	block signal
释义	WordReference Random House Unabridged Dictionary of American English © 2024 block′ sig′nal, Rail Transporta fixed railroad signal governing the movements of trains entering and using a given section of track. 1880–85 block′ sig′naling.
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