| 摘要 |
The system comprises a male element (10) equipped on its external surface (11) with multiple threads (12,13), and also a female element (20) threaded on its internal face (21). The two elements, male and female, screw together. One male thread (12) has a different profile than the other male threads (13) in order to allow adjustment of the initial positioning of the male element and the female element during attachment.
|
