GB 223.33-1984 Methods for chemical analysis of iron,steel and alloy--The chlorophosphonazo mA photometric method for the determination of cerium content after extraction separation (English Version)
1994GB/T 223.33-1994 Methods for chemical analysis of iron,steel and alloy. The chlorophosphonazo mA photometric method for the determination of cerium content after extraction separation
1984GB 223.33-1984 Methods for chemical analysis of iron,steel and alloy--The chlorophosphonazo mA photometric method for the determination of cerium content after extraction separation
GB 223.33-1984 Methods for chemical analysis of iron,steel and alloy--The chlorophosphonazo mA photometric method for the determination of cerium content after extraction separation was changed to GB/T 223.33-1994 Methods for chemical analysis of iron,steel and alloy. The chlorophosphonazo mA photometric method for the determination of cerium content after extraction separation.