The model can be used to provide decision references for the planning and management of town gas system.

利用该模型能为城市供燃气系统的规划及管理工作提供决策参考。

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Therefore, according to Beijing' s general planning, the arrangement of city - and - town system is to establish a system of four levels, namely, downtown, satellite town, central town and town.

为此，北京市总体规划确立的城镇体系布局，是建立市区、卫星城、中心镇和建制镇的四级城镇体系。

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The overall planning of new town equipped with subway, and the convenient public transit system linked by underground, have constructed a harmonious, orderly and clear arranged garden city.

新市镇与地铁的整体规划，以及由地铁连接的城市公交便捷系统，构建了一个和谐有序、层级分明的花园城市。

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