| 摘要 |
A crampon comprises a base plate fixed to a boot with excellent elasticity, an axial element arranged on a bottom of the base plate across the base plate, and a spike rotatably arranged with resting on the axial element. A knob is provided with the spike to hold the knob and rotate the spike so as to make the spike folded and unfolded as the spike uses the axial element as its axis in a state of wearing the crampon on the boot.
|
