any of various fine matted fibrous materials consisting of or made from mineral matter, and used esp. in thermal insulation or soundproofing; cf. m…
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| 单词 | θ217138 |
| 释义 | society > occupation and work > materials > derived or manufactured material > other manufactured or derived materials > [noun] > from minerals (3) rockwool1816 any of various fine matted fibrous materials consisting of or made from mineral matter, and used esp. in thermal insulation or soundproofing; cf. m… ambroid1887 A material formed by joining small pieces of amber and other resins together by means of pressure and heat. alundum1903 A proprietary name for: a hard, heat-resistant material produced by fusing alumina in an electric furnace, used chiefly as an abrasive agent. |
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