| 摘要 |
A shell 50 for a roadmarker device 10 has a body member 12 of a glass material. The body member 12 defines a chamber 14 in which a reflective element 28 is receivable. The body member 12 has a circular cylindrical base portion 16 and a raised portion 18 on top of the base portion 16. The raised portion 18, when viewed from one side of the base portion 16 is parabola-like and extends between opposed peripheries 16.1, 16.2 of the base portion 16. The raised portion 18 defines two substantially planar surfaces 20 extending in opposite directions, downwardly from a central ridge 22. <IMAGE> |
