LST EN ISO 8501-2:2002
涂漆和相关产品前钢基材的预处理 表面清洁度的目视评估 第2部分：局部去除先前涂层后先前涂覆的钢基材的制备等级（ISO 8501-2:1994）
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 (ISO 8501-2:1994)