| 摘要 |
Plastic boards (1, 2) are joined to posts (3) using flexible, elastic, rubber sheets (13), one end (14) of which is received by a hole (15) in the end (20) of a board, the other end (16) being anchored in a groove (17) in an end fitting (3, 4) joined to the post. The intermediate region (19) of the sheet has a pre-determined minimum length chosen to allow the angle of the board to be altered without having to change the position of the post. |
