China 'GB/T 223.38-1985
' standard english version:
NATIONAL STANDARD OF THE PEOPLE'S REPUBLIC OF CHINA
GB/T 223.38-1985
Methods for chemical analysis of iron,steel and alloy--The anion-exchange separation-gravimetric method for the determination of niobium content 钢铁及合金化学分析方法 离子交换分离-重量法测定铌量
Issued Date:1985-07-18
Implemented Date:1986-06-01
Issued by:
The Standardization Administration of the People's Republic of China