Home / Standards / GB/T 37786-2019 GB/T 37786-2019 Active Gear steel for numerical control machine tool 数控机床用齿轮钢 Standard Type GBT ICS 77.140.60 CCS H44 Status 现行 Issue Date 2019-08-30 Implementation 2020-07-01 Responsible Dept 中国钢铁工业协会 Drafting Unit N/A