| 摘要 |
<p>The sleeve has a sleeve body fitted on a heel, and a sleeve hole projecting at an inner side. The sleeve hole comprises a pitch of screw thread forming ribs (10), where the sleeve is screwed down on bottom of the heel. The sleeve is formed as a closed cap at an end and consists of silicone rubber or elastic thermoplastic polyurethane (TPU). The sleeve is formed in a spherical manner, and a padding made of hard material such as metal, is provided in a closed base of the sleeve.</p> |
