GB/T 9989.4-2015
搪瓷耐化学侵蚀的测定 第4部分:用圆柱形容器进行耐碱溶液侵蚀的测定
Vitreous and porcelain enamels.Determination of resistance to chemical corrosion.Part 4:Determination of resistance to chemical corrosion by alkaline liquids using a cylindrical vessel
GBT9989.4-2015, GB9989.4-2015