中華人民共和國國家標準
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 鋼鐵及合金化學分析方法 離子交換分離-重量法測定铌量
Issued Date:1985-07-18
Implemented Date:1986-06-01
Issued by:
The Standardization Administration of the People's Republic of China