英语词汇“lock-and-block system”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	lock-and-block system
释义	lock-and-block system \\| ̷ ̷ ̷ ̷\| ̷ ̷-\ noun Britain : a railway block system in which the signals permitting a train to enter a block are locked while a train is in the block and automatically unlocked as it leaves the block
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