This year, the captains were William Chambers, Sean Cockey, Anders Lee, and Mark Williams. I believe none of them has had previous experience with hairstyling. The primary mechanism in the hair cutter is a grating that will trap the hair in holes while blades whittle away at the black stems. An extension can be placed on the shaver in order to change the length of the hair being shaved off. This allows a hairstylist to design a pattern as the one shown below. The blades inside the shaver work as they are moving very fast and they have a sharp cutting edge. Since pressure is force over area, when force is large and area is small, the cutting power is optimized. But such power cannot be maintained forever. The blades will eventually dull and the surface area will be increased. That is why replacement blades must be bought every once in a while.
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