Home / Standards / GB/T 1979-2001 GB/T 1979-2001 Abolished Standard diagrams for macrostructure and defect of structural steels 结构钢低倍组织缺陷评级图 Standard Type GBT ICS 77.040.01 CCS H24 Status 废止 Issue Date 2001-12-17 Implementation 2002-05-01 Responsible Dept 中国钢铁工业协会 Drafting Unit 中国钢铁工业协会