VB is object oriented program language, Trail chart with it, the step of solution of chart trail law can be expressed in proper order, and the machine processing technology of part can be generated.
VB是面向对象的程序语言，用它开发的程序界面友好，便于操作，用它将图表跟踪法的求解步骤一一表达出来，就能生成零件的机加工工艺。
This paper aims at introducing object-oriented program language using SAS/AF with the concepts of OOA and OOD. And it also discusses how to achieve these concepts in SAS/AF language.
本文结合面向对象分析（OOA）与面向对象设计（OOD）介绍了面向对象的SAS/AF程序语言及探讨了面向对象的理念在SAS/AF中的实现。
Based on the tool of VB which is visual and object-oriented program language, we develop the Chain-transmission design system which is with friendly interface of user.
本系统以VB的可视化的、面向对象的编程语言为开发工具，开发了链传动设计系统。
Based on the tool of VB which is visual and object-oriented program language, we develop the Chain-transmission design system which is with friendly interface of user.
本系统以VB的可视化的、面向对象的编程语言为开发工具，开发了链传动设计系统。
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