Home / Standards / GB/T 4271-2021 GB/T 4271-2021 Active Test methods for the performance of solar collectors 太阳能集热器性能试验方法 Standard Type GBT ICS 27.160 CCS F12 Status 现行 Issue Date 2021-12-31 Implementation 2022-07-01 Responsible Dept 国家标准委 Drafting Unit N/A