Home / Standards / GB/T 20937-2018 GB/T 20937-2018 Active Potassium magnesium of sulphate fertilizer 硫酸钾镁肥 Standard Type GBT ICS 65.080 CCS G21 Status 现行 Issue Date 2018-05-14 Implementation 2018-12-01 Responsible Dept 中国石油和化学工业联合会 Drafting Unit N/A