Home / Standards / GB/T 1421-2018 GB/T 1421-2018 Active Rhodium powder 铑粉 Standard Type GBT ICS 77.150.99 CCS H68 Status 现行 Issue Date 2018-09-17 Implementation 2019-06-01 Responsible Dept 中国有色金属工业协会 Drafting Unit N/A