eb·o·nite /ˈɛbəˌnaɪt/
硬化橡皮,硬橡皮
Eb·on·ite n. Chem. A hard, black variety of vulcanite. It may be cut and polished, and is used for many small articles, as combs and buttons, and for insulating material in electric apparatus.
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ebonite
n : a hard nonresilient rubber formed by vulcanizing natural
rubber [syn: hard rubber, vulcanite]