KS M ISO 8501-2-2019 应用涂料和相关产品前的钢基材料的制备 - 表面清洁度的目视评估 - 第2部分:局部除去以前的涂层之后的预先涂覆的钢基材的制备等级
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 lo