“railway tunnel maintenance”的概念、定义、翻译、参考文献-科学参考

单词	railway tunnel maintenance
释义	railway tunnel maintenance Encyclopedia 工学﹝铁路工务养护维修﹞释 railway tunnel maintenance铁路隧道养护维修对铁路隧道主要结构和附属设施（拱墙结构、隧底结构、防排水设施、附属洞室、洞室门、洞门结构等）进行的检查、养护、维修和大修。
随便看	lower asymptotic density lower atmosphere lower base lower body negative pressure lower Bohl exponent lower bound lower boundary lower boundary condition lower bounded lower bounded variable lower bound of a family lower bound of a function lower bound of an operator lower bound of a set lower bound on the minimum mean square error lower branch lower Burkill integral Lower Canada lower carbon alcohols lower center series lower central chain lower central exponent lower central series lower chromosphere lower circle

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