Home / Standards / GB/T 17415.2-2010 GB/T 17415.2-2010 Active Methods for chemical analysis of tantalum and niobium ores - Part 2: Determination of niobium content 钽矿石、铌矿石化学分析方法 第2部分:铌量测定 Standard Type GBT ICS 73.060 CCS D43 Status 现行 Issue Date 2010-11-10 Implementation 2011-02-01 Responsible Dept 自然资源部(国土) Drafting Unit N/A