After the skates are used for a long time, the blade will be smooth and blunt, and the ice will not be caught. At this time, you need a sharpening knife to sharpen the knife.
So how do you judge whether the skate shoes should be sharpened?
First, the mission objectives
The main action of the military grip on one leg to support the sliding process, strengthen the feeling and consciousness of using the weight and pressure to carry out the depression.