| 摘要 |
A cast ground surface access item 11 includes an identification surface 16 defining an identification area 22. The identification area includes a plurality of formations 24 which form a message 28 or can be subjected to a secondary process to form a plurality of messages. The identification area maybe formed of a separate element 88 and inserted. The identification area or the insertion elements or formations thereof maybe formed of a non metallic substance such as resin, plastics or other compound. |
