Based on the analysis of industrial graphics commonly used, abstract the basic graphic elements, which are designed by object-oriented method.
根据对常用工业图形的分析，抽象出支持的基本图元类，采用面向对象方法设计实现。
Based on the analysis of industrial graphics commonly used, abstract the basic graphic elements, which are designed by object-oriented method.
根据对常用工业图形的分析，抽象出支持的基本图元类，采用面向对象方法设计实现。
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