| 摘要 |
A pole or the like formed by an anchoring member and a vertical member which are linked by a linking piece having a zone of lower resistance to force. Block members are provided at the opposite ends of the anchoring member and the vertical member each of which has a central bore for receiving the linking piece and at least one of the block members has a surface slopping from its center towards it periphery such that a space between the opposite block members is greater at the periphery of the pole than at its center. |
