野生和栽培防风在性状有较大区别，主要表现在药材形状、颜色、质地、折断面、气味等方面。
Fangfeng in the wild and cultivated traits quite different , mainly in herbs shape , color , texture , broken face , smell and so on . 3 .
轧制折缘异型断面型钢轧制压力计算
Rolling pressure calculation for production of edged profiled bar
折断面