英语词汇“permissive 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	permissive block system
释义	permissive block system permissive block system [pər¦mis·iv ′bläk ‚sis·təm] (civil engineering) A block system in which a railroad train is permitted to enter a block section already occupied by a train.
随便看	delivery server delivery service pack delivery service partner delivery site registry delivery source code delivery, special conditions of delivery status factor delivery status notification delivery status notification: failure delivery system delivery system strategy delivery/task order delivery/task order compliance review form delivery term code delivery terms delivery ticket delivery ticket invoice delivery to customer delivery traffic indication message delivery truck delivery under bond delivery unit delivery unit computer delivery van delivery verification certificate

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