... lies in following two point: :1. when cutter head meets the rubber, it can use creep force ... the rubber will be crushed easily.2.the cutter head is annular, our design can make the creep ... force can be distributed evenly on the annular cutter head, the erea of creep force distributed can ... the heat caused by friction.Beside these , the cutter head has high hardness and high abrasion resistance, because ...