| 摘要 |
The joint comprises a body (7) having a plane support area (12) from which a foot (13) extends. A counter curved lip joint (9) defining a first articulation part (91) is connected to the body and a second curved part (92) extends beyond a plane (PP') passing through the plane support area. A cover lip also has its end (18) extending beyond the plane relative to the external surface.
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