Home / Standards / GB/T 37775-2019 GB/T 37775-2019 Active Heavy steel open die forgings—General technical specification 大型钢质自由锻件 通用技术规范 Standard Type GBT ICS 77.140.85 CCS J32 Status 现行 Issue Date 2019-08-30 Implementation 2019-08-30 Responsible Dept 中国机械工业联合会 Drafting Unit N/A