Home / Standards / GB 12958-1999 GB 12958-1999 Abolished Composite portland cement 复合硅酸盐水泥 Standard Type GB ICS 91.100.10 CCS Q11 Status 废止 Issue Date 1999-07-30 Implementation 1999-12-01 Responsible Dept 中国建筑材料联合会 Drafting Unit N/A