Home / Standards / GB/T 13299-1991 GB/T 13299-1991 Abolished Steel--Determination of microstructure 钢的显微组织评定方法 Standard Type GBT ICS 77.040.30 CCS H24 Status 废止 Issue Date 1991-12-13 Implementation 1992-10-01 Responsible Dept 中国钢铁工业协会 Drafting Unit N/A