GB/T 23981.1-2019色漆和清漆遮盖力的测定第1部分:白色和浅色漆对比率的测定国家标准
英文:Paints and varnishes—Determination of hiding power—Part 1: Determination of contrast ratio of white and light coloure...
英文:Paints and varnishes—Determination of hiding power—Part 1: Determination of contrast ratio of white and light coloure...