Home / Standards / GB/T 17991 GB/T 17991 Abolished Definitions of terms relating to industrial ceramics 工业陶瓷及相关术语 Standard Type GBT ICS 81.060.01 CCS Q31 Status 废止 Issue Date 1999-11-01 Implementation 2000-01-01 Responsible Dept 中国建筑材料联合会 Drafting Unit 中国建筑材料联合会