UML是一种对分布式对象系统可视化，说明，构建以及记录的图形化定义语言。
UML is a specification that defines a graphical language for visualizing, specifying, constructing, and documenting the artifacts of distributed object systems.
本文对网络环境下分布式图形协作编辑系统的设计与实现进行了讨论。
Designing and realization of distributed graphics collaborative editing systems in net environment is discussed in this paper.
介绍了采用多层分布式技术实现牵引供电运营管理系统中图形图片管理子系统的方法。
The paper presents the implementing methods of graph-picture management sub-system in traction power supply management system by adopting multi-tier distribution structure technology.
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