“heavy-duty maintenance machinery”的概念、定义、翻译、参考文献-科学参考

单词	heavy-duty maintenance machinery
释义	heavy-duty maintenance machinery Encyclopedia 工学铁路养路机械释 heavy-duty maintenance machinery大型养路机械在封闭线路条件下，用于铁路线路路基、道床、轨枕及道岔、钢轨等工务基础设施的大修、综合维修及专项修理的机械设备。
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