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Carborundum (n.)
[Carborundum 词源字典]
silicon carbide used as an abrasive, (reg. trademark U.S. June 21, 1892, by Carborundum Co. of Monongahela City, Pa.), from
carbon
+
corundum
.
[Carborundum etymology, Carborundum origin, 英语词源]
[Carborundum 词源字典]