“urban rail transit operation and maintenance”的概念、定义、翻译、参考文献-科学参考

单词	urban rail transit operation and maintenance
释义	urban rail transit operation and maintenance Encyclopedia 工学城市轨道交通运营维护保养释 urban rail transit operation and maintenance城市轨道交通运营维护保养在城市轨道交通开通运营后，为保障安全、可靠、经济运营，针对轨道交通设施设备的维护保养。
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