Brown aluminium oxide abrasive is fused and crystallized under high temperature from a mixture of bauxite and other materials.

布朗的三氧化二铝磨料，是融合和凝结着高温条件下，从混合铝土矿和其他材料。

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Brown aluminium oxide is fused and crystallized under high temperature from a mixture of bauxite and other and other raw materials.

棕刚玉是以铝矾土等为原料，经高温熔炼结晶而成。

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Brown aluminium oxide Brown aluminium oxide is fused and crystallized under high temperature from a mixture of bauxite and other and other raw materials.

棕刚玉是以铝矾土等为原料，经高温熔炼结晶而成。

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