Network Management and Maintenance Center (NMMC) of Guangzhou Telecom is the core department of local network operation and maintenance.

广州电信网管维护中心是广州电信网络运行维护作业层的核心部门。

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Reports and follows up on any maintenance requirements in close co-operation with Engineering department, and ensure that they are remedied promptly.

同工程部密切合作，汇报并跟踪维修工作的进展，以便能及时完成维修任务。

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Support the operation department up to mass production. Support other departments about HW issues and maintenance.

支持生产部门的转产工作，支持其他部门的所有和硬件有关的需求。

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The State of California, Department of Transportation (Caltrans) is responsible for the design, construction, maintenance, and operation of the California State Highway System, as well as that portion of the Interstate Highway System within the state's boundaries.

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