| 摘要 |
The screw roller includes a crushing section (20) rotated by a motor and provided with a thread (21) made of metal in order to crush the material fed through a hopper, and a pair of roller bodies divided from the crushing section to a transfer section (30) for delivering the crushed material, wherein the surface of the crushing section (20) is coated with a hard coating film having a predetermined thickness, high toughness and hardness.
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