The development and application of raw minerals and products of spinels are also briefly introduced.
晶石的其它应
，
晶石轴承及颜料等也取得了较大的发展。
The development and application of raw minerals and products of spinels are also briefly introduced.
晶石的其它应，晶石轴承及颜料等也取得了较大的发展。
From all possible members of the spinel groups， hercynite and galaxite， were found to be the most efficient.
在所有可能的晶石矿族成员中，
铝晶石和锰铝晶石被发现是最有效的(添加剂)。
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