Home / Standards / GB/T 42721-2023 GB/T 42721-2023 Active Electronic specialty gas—Nitric oxide 电子特气 一氧化氮 Standard Type GBT ICS 71.100.20 CCS G86 Status 现行 Issue Date 2023-08-06 Implementation 2024-03-01 Responsible Dept 国家标准委 Drafting Unit N/A