GB/T 8923.4-2013
ActivePreparation 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
涂覆涂料前钢材表面处理 表面清洁度的目视评定 第4部分：与高压水喷射处理有关的初始表面状态、处理等级和闪锈等级
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