| 摘要 |
The flexible post part comprises a concentric arrangement of tube pieces (5) fixed into position by a spiral torsion spring (4) stretched between the soil anchor part (2) and the uppermost tube piece. The diameter of the spring is only slightly less than the internal diameter of the tube pieces. The soil anchor part can be provided with threading (10) and an information, warning or marking plate can be fitted onto the top end of the post. |
