Home / Standards / GB/T 21839-2008 GB/T 21839-2008 Abolished Steel for prestressed concrete - Test methods 预应力混凝土用钢材试验方法 Standard Type GBT ICS 77.040.01;77.140.15 CCS H20 Status 废止 Issue Date 2008-05-13 Implementation 2008-11-01 Responsible Dept 中国钢铁工业协会 Drafting Unit N/A