【中文名称】：拓扑连接 【英文名称】：Topological Link 【定义1】： 拓扑连接指两个由同一EMS管理的物理终端点（即物理端口）之间的链路，这两个终端点并不一定处于相邻的网元，拓扑连接可表示终端点之间的逻辑连接。
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At each link of planning and design, common utilization and being topological should be stressed so that enterprise logistic can support the reconfiguration of manufacturing system.
为使企业物流更好地支持制造系统重构，在规划设计的各个环节应突出通用性、可拓扑性。
This paper is mainly concerned with the way how to construct a data link layer which is adaptable to Ethernet of tree topological in TV cable.
如何构造适应视缆树形拓扑的以太网数据链路层，是本文论述的重点。
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