| 摘要 |
The part (3b) has an opening threaded hole (10) extended along a direction transversal to other directions, where the threaded hole is formed adjacent to a seat (11) and a base of a bowl (12). The seat is accessible from a convex extrados (8), and the threaded hole extends towards a concave intrados (9). The thread hole permits passage of a non-threaded body part (17) of a body (16) of a fixation screw (4) or permits assembling with a threaded body part (18) of the body of the screw. |
