OENORM EN ISO 8501-4:2021 涂漆和相关产品前钢基材的准备 表面清洁度的目视评估 第4部分:与水喷射有关的初始表面条件、准备等级和闪锈等级(ISO 8501-4:2020)
Preparation of steel substrates before application of paints and related products - Visual assessment of surface cleanliness - Part 4: Initial surface conditions, preparation grades and flash rust grades in connection with water jetting (ISO 8501-4:2020)