The establishment mechanism of the UDF is studied. Through analyzing the characters of wiring device products,their UDF library is built and the efficiency of product design is improved.

• 通过对用户自定义特征的研究,结合集线器产品的结构特点,分析、归类并提取相关产品的共性特征,设计并建立相关产品的UDF(UserDefinedfuture)库,提高集线器产品的设计效率。