According to the causes,the surface defects can be divided into blister containing non-metallic inclusion,blister without non-metallic inclusion and “raindrop”,“gills”，“mountained”.
有非金属夹杂的气囊
面缺陷；由气泡产
的“雨点”状面缺陷；“鱼鳞”状面缺陷；“山水画”状面缺陷。
According to the causes,the surface defects can be divided into blister containing non-metallic inclusion,blister without non-metallic inclusion and “raindrop”,“gills”，“mountained”.
有非金属夹杂的气囊面缺陷；由气泡产的“雨点”状面缺陷；“鱼鳞”状面缺陷；“山水画”状面缺陷。
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