weightmaterialabou的知识精选

   Styrofoam,orpolystyrene,isalight-weightmaterial,abou...
问题详情:   Styrofoam,orpolystyrene,isalight-weightmaterial,about95percentair,withverygood insulation(隔热)properties,accordingto.Itisusedinproductsfromcupsthat keepyourdrinkshotorcoldtopackagingm...
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