Home / Standards / GB/T 40418-2021 GB/T 40418-2021 Active Electronic specialty gas—Fluoromethane 电子特气 氟甲烷 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