Home / Standards / GB/T 39430-2020 GB/T 39430-2020 Active Specifications for the blanks of high reliability gears 高可靠性齿轮毛坯技术要求 Standard Type GBT ICS 21.200 CCS J17 Status 现行 Issue Date 2020-11-19 Implementation 2021-06-01 Responsible Dept 国家标准委 Drafting Unit N/A