例3:滚柱建模一变量表、特征表驱动 关键步骤: Name Equaton Comment 100 length of longer shaft 建立变量( variables.x60 length of shorter shaft 40 radius of shorter shaft 自由草图轮廓 20 20 添加等长(equa length)和变量尺寸约 束 ■作回转特征(revo/e eature)属于草图特 征( sketch feature)