Home / Standards / GB/T 15677-2023 GB/T 15677-2023 Active Lanthanum metal and lanthanum powder 金属镧及镧粉 Standard Type GBT ICS 77.120.99 CCS H65 Status 现行 Issue Date 2023-08-06 Implementation 2024-03-01 Responsible Dept 国家标准委 Drafting Unit N/A