| 摘要 |
The invention ensures the connection between a mobile element (2) which can be displaced by rotation around its swivels (3), and a fixed structure (1), said connection comprising a shaft (8) situated on a fixed structure element (1) and assembled with an internal swivelling ring (5) that is disposed on the mobile element (2); a rotation snug and an axial snug are disposed on the head of said shaft (8), with no access being possible from the other end. |
