Home / Standards / GB/T 18809-2019 GB/T 18809-2019 Active General specification for air ion measuring instruments 空气离子测量仪通用规范 Standard Type GBT ICS 19.040 CCS L85 Status 现行 Issue Date 2019-08-30 Implementation 2020-03-01 Responsible Dept 工业和信息化部(电子) Drafting Unit N/A