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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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更新时间:2024/9/20 14:31:21