Home / Standards / GB/T 20480-2025 GB/T 20480-2025 Active Classification of sand and dust weather 沙尘天气等级 Standard Type GBT ICS 07.060 CCS A47 Status 现行 Issue Date 2025-05-30 Implementation 2025-12-01 Responsible Dept 中国气象局 Drafting Unit N/A