GB/T 9989.1-2015 搪瓷耐化学侵蚀的测定 第1部分:室温下耐酸侵蚀的测定 Vitreous and porcelain enamels—Determination of resistance to chemical corrosion—Part 1:Determination of resistance to chemical corrosion by acids at room temperature
Vitreous and porcelain enamels—Determination of resistance to chemical corrosion—Part 1:Determination of resistance to chemical corrosion by acids at room temperature