“alumina abrasive”的概念、定义、翻译、参考文献-科学参考

单词	alumina abrasive
释义	alumina abrasive Encyclopedia 工学普通磨料释 alumina abrasive刚玉磨料以a型三氧化二铝为主晶相的普通磨料。简称刚玉。旧莫氏硬度8.9～9.1，新莫氏硬度12。
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