| 摘要 |
<p>The anchorage (1) has a grommet portion (3) that is rotated about the longitudinal axis of the connection screw shaft (6). A head portion (17) is formed on the shaft of connection screw (2). A rotary pickup surface (18) is provided on the outer side of head portion along a radial direction. The rotational torque of grommet portion is transferred to the connection screw along the rotary pickup surface of head portion. Another rotary pickup surface (19) is arranged away from the rotary pickup surface of connection screw at a specific radial distance.</p> |
