JB/T 9493.7-1999
锰铜和新康铜电阻合金化学分析方法 苯甲酸铵分离-EDTA滴定法测量铝量
Method for chemical analysis of manganin and novokostant resistance alloy The EDTA titrimetric method for the determination of aluminum content after separation with ammonium benzoate
JBT9493.7-1999, JB9493.7-1999