Home / Standards / GB/T 34412-2017 GB/T 34412-2017 Active Statistical method for surface standard climate normals 地面标准气候值统计方法 Standard Type GBT ICS 07.060 CCS A47 Status 现行 Issue Date 2017-09-29 Implementation 2018-04-01 Responsible Dept 中国气象局 Drafting Unit N/A