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Its main raw material is a bayer alumina, which is electrically fused in high temperature.
白刚玉磨料是以氧化铝为原料, 经高温熔炼而成.
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Its main raw material is bayer alumina, which is electrically fused in high temperature.
白刚玉是以氧化铝粉为原料,经高温熔炼而成.
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