常見例句雙語例句With brown, white fused alumina compared to high hardness, toughness, showed a single particle spherical crystal, has a good multi-row cutting edge, strong anti-crushing.與棕，白剛玉相比硬度高，靭性大，呈單顆粒球狀晶躰，具有良好的多稜切削刃，抗破碎較強(qiáng)。Principal component of brown fused alumina is the alumina, therefore, the aluminum content is used to distinguish its graduation, the lower the aluminum content is, the lower thehardness wll be.棕剛玉主成分是氧化鋁，分等級(jí)也就用鋁含量來區(qū)分， ， 鋁含量越低也就硬度越低了。權(quán)威例句The company purchases huge volumes of earths (like brown and white fused alumina), which are their raw material manufacturing inputs.FORBES: Commodity Bubble Redux In Full Effect 返回 brown fused alumina