| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide an expansion plug improved in retention characteristics.SOLUTION: At least one expansion leg 10 has at least one cavity 14 extending only over a part of longitudinal extent of an expansion area 3. The expansion leg 10 surrounds the cavity 14 at least partially in a radial direction r on sides of a surface 11 and an expansion channel.</p> |
