Home / Standards / GB/T 25915.1-2021 GB/T 25915.1-2021 Active Cleanrooms and associated controlled environments—Part 1: Classification of air cleanliness by particle concentration 洁净室及相关受控环境 第1部分：按粒子浓度划分空气洁净度等级 Standard Type GBT ICS 13.040.35 CCS C70 Status 现行 Issue Date 2021-08-20 Implementation 2022-03-01 Responsible Dept 国家标准委 Drafting Unit N/A