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	block signal noun also block signal system : a fixed signal at the entrance of a block to govern railroad trains entering and using that block — compare block system 2
随便看	chemiosmotic chemiphotic chemise chemisette chemism chemisorb chemisorption chemist chemist chemistry chemistry chemist's chemist's shop chemmy chemnitz chemo chemo- chemo chemoautotroph chemoautotrophic chemoautotrophically chemoautotrophy chemodifferentiation chemogenic chemogenous

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