| 摘要 |
The present invention concerns a building element for constructing noise protection screens, in which element each corner 5, 6, 7, 8 of an essentially square hollow profile 1 - 10 is inverted and directed in towards the centre of the profile 1 - 8, and at least one side of the profile 1- 8, drawn in as a result of the inversion of the corners, is provided at each edge with an outwardly directed flange 9, 10, and the flanges 9, 10 are parallel with each other and fit round the sides, drawn in as a result of the inversion of the corners, of another essentially identical profile 1 - 8. <IMAGE> |
