| 摘要 |
<p>The boot (1), having a collar (3) pivoted to its upper (2) by rivets (6) and circular recesses at ankle level to allow forward and rearward movements of the lower leg. The upper and collar assembly has a groove (22) in one component and a rib (10) on the other, both in the shape of arcs of the same radius, centers on the axis (7) of the rivet (6) with the rib able to slide freely along the groove. The rear end of the groove can be open to permit insertion of the rib, or both ends can be closed and the rib inserted by bending it.</p> |
