| 摘要 |
<p>The shoe (1) has an external shoe bottom (12) extending in length from a rear end (14) until a front end (15), and extending in height between a free face (18) and a connection face (19). The external shoe bottom has a longitudinal groove (25) which is opened at the level of the free face. The groove has length comprised between 30 and 100 percentages of length of the external shoe bottom, and has width comprised between 25 and 45mm. The groove has depth greater than or equal to 4mm. The groove is compatible with one or multiple guiding edges (29) of a guiding device (28).</p> |
