KS M ISO 8501-2-2008 涂料和有关产品使用前钢衬底的制备.表面清洁度的视觉评估.第2部分:已有覆层局部除去后已涂覆钢衬体的制备等级
Preparation of steel substrates before application of paints and related products-Visual assessment of surface cleanliness-Part 2:Preparation grades of previously coated steel substrates after localized removal of previous coatings