单词 | hard plastic |
释义 | hard plastic/ˌhɑːd ˈplastɪk/noun Originally: a substance that started in a plastic (mouldable) state and was subsequently made hard or rigid (now disused ). In later use: a plastic that is hard and rigid, such as PVC, ABS, and polymerized methyl methacrylate; plastic of this kind. OriginLate 19th century; earliest use found in U.S. Patents. From hard + plastic. |
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