This thesis also introduces two methods which are concerning distributed database replication and data pipeline object realize data synchronization.

最后，本文还论述了如何采用数据管道对象和数据库复制两种技术来实现分布数据库的数据同步。

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The proxy injects input data into the pipeline and receives any return value as initially generated by the target object and then further modified by behaviors.

该代理将输入资料注入到管道中，然后在资料经目标物件最初生成接著由行为进一步修改后，该代理接收任何返回值。

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First, with object-oriented thought, we divide the underground pipeline system level to clarify the pipe system hierarchy and rend different level category pipeline data.

首先，根据面向对象的思想，划分地下管线系统层次，理清管线系统数据间的关系，并对管线系统的数据进行分层渲染；

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