Order system maintenance.

订单系统维护。

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Core services of CORBA: Study the accomplishment of Event service, Naming service in order to improve system efficiency and allow developers to perform system upgrade and maintenance.

CORBA核心服务的实现：研究实现信道服务、命名服务，提高系统效率，便于开发人员对系统进行更新和维护的方法。

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Since the purification flow plays an important role during NPS maintenance or refueling cold shutdown, the RRA system of Daya Bay NPS must be modified in order to increase the purification flow.

而该净化流量在电站维修或冷停堆期间起着非常大的作用，改进停堆余热冷却系统，提高化学容积控制系统净化流量成了当务之急。

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