The ammonium tungstate igniting gravimetric method for the determination of tungsten trioxide content 钨酸铵灼烧法测定三氧化钨量
2.
Method for the determination of tungsten trioxide content in ammonium paratungstate for import export 进出口仲钨酸铵中三氧化钨含量的测定
3.
Methods for chemical analysis of tin concentrates determination of tungsten trioxide content - the thiocyanate spectrophotometric method 锡精矿化学分析方法三氧化钨量的测定硫氰酸盐分光光度法
4.
Methods for chemical analysis of tungsten concentrates - the ammonium tungstate igniting gravimetric method for the determination of tungsten trioxide content 钨精矿化学分析方法钨酸铵灼烧法测定三氧化钨量
