NF T30-501-4-2007
涂装油漆和有关产品前钢材预处理.表面清洁度的目视评估.第4部分:与高压水冲法有关的初始表面条件、制备等级和闪锈等级
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 high-pressure water jetting.