JB/T 7948.12-1995 Methods for chemical analysis of melted welding fluxes.The EDTA volumatric method for determination of calcium oxide and magnesium oxide content (English Version)
2017JB/T 7948.9-2017 Flux chemical analysis methods Part 9: Determination of calcium oxide and magnesium oxide content
1999JB/T 7948.12-1999 Methods for chemical analysis of melted welding fluxes.The EDTA volumatric method for determination of calcium oxide and magnesium oxide content
1970JB/T 7948.12-1995 Methods for chemical analysis of melted welding fluxes.The EDTA volumatric method for determination of calcium oxide and magnesium oxide content