| 摘要 |
The assembly has posts (210, 220) fixed on a crosspiece (110) by a screw traversing thickness of the posts. Spherical supports are arranged between heads of the screw and the posts, where the supports co-operate with orifices adapted in thickness of the posts to allow the screw to satisfy its clamping function on a wide angular interval. A support washer includes a plain surface that is in contact with the head of the screw. A profile of the crosspiece is preformed of alveolus type longitudinal channels (112). |
