英语词汇“section block, double-tracked railway safety technology”的意思、用法、释义、翻译、读音、例句、短语、词组-英汉翻译词典

单词	section block, double-tracked railway safety technology
释义	section block, double-tracked railway safety technology [作业运输] 分段阻隔，双轨的，铁路安全技术
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