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

单词	signal box
释义	Word Frequency signal box noun 1. a building containing manually operated signal levers for all the railway lines in its section 2. a control point for a large area of a railway system, operated electrically and semiautomatically
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