UDC622.341.1:543.06B中华人民共和国国家标准GB6730.2786铁矿石化学分析方法镧-茜素络合腙光度法测定氟量Methods for chemical analysis of iron oresThe lanthanum-alizarin complexon photometricmethod for the determination of fluorine content1986-08-19发布1987-08-01实施国家标准局发布
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