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采用参数化设计技术，把设计实例的数据从图形中抽象出来，提出ＣＡＳＥ＝数据＋结构的实例描述新方法。结合上述实例描述方法和现代数据库技术、参数化设计及面向对象的设计方法，以液压缸设计为例，实现了数据和结构分离的实例描述。
Using parametric design techniques, the data of the design examples are abstracted from the figures, and a new method of CASE = data + structure is described. Combining with the above example description method and modern database technology, parametric design and object-oriented design method, the hydraulic cylinder design is taken as an example to realize the example description of data and structure separation.