| 摘要 |
A method for hardening at a surface a component, the component being formed of a plastics material, comprises softening the component at a surface using supercritical carbon dioxide and incorporating into the component at the surface a material to harden the surface. There is also disclosed a device having one or more surfaces hardened according to the aforementioned method and a device for retaining and presenting for use one or more components which comprises a plurality of components arranged in a disc portion and means for moving one or more of the components from a rest position to an in use position. |
