Home / Standards / GB/T 13747.20-1992 GB/T 13747.20-1992 Abolished Zirconium and zirconium alloys--Determination of hafnium content--Emission spectrographic method 锆及锆合金化学分析方法 发射光谱法测定铪量 Standard Type GBT ICS 77.120.70 CCS H14 Status 废止 Issue Date 1992-11-05 Implementation 1993-06-01 Responsible Dept 中国有色金属工业协会 Drafting Unit N/A