Testing of raw materials for the production of glass; chemical analysis of arenaceous quartz with at least 98 % silica, fusion process for the determination of Al<(Index)2>O<(Index)3>, Fe<(Index)2>O<(Index)3> and TiO<(Index)2> as we-ll as CaO, MgO, Na<(Index)2>O and K<(Index)2>O
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 测定Al<(指数)2>O<(指数)3>、Fe<(指数)2>O<(指数)3>和TiO<(指数)2>的熔融过程 以及CaO、MgO、Na<(指数)2>O和K<(指数)2>O