Testing of raw materials for the production of glass; chemical analysis of arenaceous quartz with at least 98 % silica, determination of the total content calculated as iron(III)-oxide Fe<(Index)2>O<(Index)3>
玻璃生产原材料的测试;含至少98%二氧化硅的砂质石英的化学分析 以铁(III)-氧化物Fe<(指数)2>O<(指数)3>计算的总含量的测定