Home / Standards / GB/T 40417-2021 GB/T 40417-2021 Active Electronic specialty gas—1,3-Hexafluorobutadiene 电子特气 六氟丁二烯 Standard Type GBT ICS 71.100.20 CCS G86 Status 现行 Issue Date 2021-08-20 Implementation 2022-03-01 Responsible Dept 国家标准委 Drafting Unit N/A