Starting with the origin of Component category in component technique, we consider it an important concept, and the support for it in COM(Component Object Model) is not sufficient.
从构件类别概念的来由和作用开始，分析了COM技术中对构件类别支持的不足，并对此提出了新的扩展和实现。
In this paper, based on object-oriented technique, an applied arrow network model is studied and a component of arrow network tools is developed.
作者结合面向对象的设计思想，提出了一种实用的网络计划模型，并实现了实用网络计划工具类组件。
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