The development and application of raw minerals and products of spinels are also briefly introduced.
的其它应用,如轴承及颜料等也取得了大的发展。
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Right in the midst of this half-sad, half-sentimental reverie, she heard a familiar voice behind her say earnestly: " And allophite is the new hydrous silicate of alumina and magnesia, much resembling pseudophite, which Websky found in Silesia" .
就这半是悲伤、半是感伤的遐想中,她听到身后个熟悉的声音恳切地说:“异镁石是新的氧化铝和氧化镁含水硅酸盐,很像韦伯斯基西里西亚发现的假晶石。”