Home / Standards / GB/T 4797.4-2019 GB/T 4797.4-2019 Active Classification of environmental conditions—Environmental conditions appearing in nature—Solar radiation and temperature 环境条件分类 自然环境条件 太阳辐射与温度 Standard Type GBT ICS 19.020 CCS A21 Status 现行 Issue Date 2019-12-10 Implementation 2020-07-01 Responsible Dept 国家标准委 Drafting Unit N/A