EN ISO 8501-3:2007
涂料和相关产品应用前钢基底的制备.表面清洁度的视觉评估.第3部分:具有表面不完整性的焊缝、边缘和其它区域的制备等级
Preparation of steel substrates before application of paints and related products - Visual assessment of surface cleanliness - Part 3: Preparation grades of welds, edges and other areas with surface imperfections