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单词 boron carbide
释义 boron carbide
noun
: any binary compound of boron and carbon; especially : a refractory shiny black crystalline solid B4C ranking next to the diamond in hardness made usually by heating boric oxide and coke in an electric furnace and used chiefly as powdered and molded abrasives
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更新时间:2025/3/29 17:13:33