Home / Standards / GB/T 38749-2020 GB/T 38749-2020 Active Technical requirements of controlled atmosphere heat treatment 可控气氛热处理技术要求 Standard Type GBT ICS 25.200 CCS J36 Status 现行 Issue Date 2020-04-28 Implementation 2020-11-01 Responsible Dept 国家标准委 Drafting Unit N/A