Home / Standards / GB/T 37559-2019 GB/T 37559-2019 Active Normalizing and annealing of heavy steel forgings 大型锻钢件的正火与退火 Standard Type GBT ICS 25.200 CCS J36 Status 现行 Issue Date 2019-06-04 Implementation 2020-01-01 Responsible Dept 国家标准委 Drafting Unit N/A