GB 223.36-1985 Methods for chemical analysis of iron,steel and alloy--The volumetric method for the determination of nitrogen content after distillation separation (English Version)
1994GB/T 223.36-1994 Methods for chemical analysis of iron, steel and alloy. The neutral titration method for the determinaion of nitrogen content after distillation separation
1985GB 223.36-1985 Methods for chemical analysis of iron,steel and alloy--The volumetric method for the determination of nitrogen content after distillation separation
GB 223.36-1985 Methods for chemical analysis of iron,steel and alloy--The volumetric method for the determination of nitrogen content after distillation separation was changed to GB/T 223.36-1994 Methods for chemical analysis of iron, steel and alloy. The neutral titration method for the determinaion of nitrogen content after distillation separation.