色漆和清漆 涂层老化的评价 缺陷的数量和大小以及外观均匀变化程度的标识 第1部分:总则和标识体系
Paints and varnishes—Evaluation of degradation of coatings—Designation of quantity and size of defects,and of intensity of uniform changes in appearance—Part 1: General introduction and designation system