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研究夹具特征的表达方法，给出特征及夫具特征的定义，参照ＳＴＥＰ中的特征模型，对夹具特征进行分类，研究特征体素、夹具特征的知识化表示方法，讨论夹具特征库的建立。
The definition of features and funeral features is given. The feature of STEP is classified with reference to the feature model of STEP. The knowledge representation of feature voxels and fixture features is discussed, and the establishment of fixture features library is discussed.