Home / Standards / GB 8239-1997 GB 8239-1997 Abolished Normal concrete small hollow block 普通混凝土小型空心砌块 Standard Type GB ICS 91.100.30 CCS Q15 Status 废止 Issue Date 1997-05-06 Implementation 1997-11-01 Responsible Dept 中国建筑材料联合会 Drafting Unit N/A