Home / Standards / GB/T 28412-2012 GB/T 28412-2012 Active General specification of superalloy investment cast airfoils 高温合金精铸叶片通用技术条件 Standard Type GBT ICS 77.140.99 CCS H57 Status 现行 Issue Date 2012-06-29 Implementation 2013-03-01 Responsible Dept 中国钢铁工业协会 Drafting Unit 中国钢铁工业协会