The development and application of raw minerals and products of spinels are also briefly introduced.
尖晶
它应用，如尖晶轴承及颜料等也取得了较大发展。
The development and application of raw minerals and products of spinels are also briefly introduced.
尖晶它应用，如尖晶轴承及颜料等也取得了较大发展。
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，
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