| 摘要 |
A cutting blade has a pocketed cutting portion and a massive portion at a lower end of said cutting blade. The cutting blade includes a first face and a second face at a spaced distance from the first face, the first and second faces defining a massive portion of the cutting blade. The cutting blade also has exterior side walls extending between the first and second faces, and a plurality of interior side walls spaced inwardly of the exterior side walls and extending from the second face toward the first face to define the pocketed cutting portion of the cutting blade. The cutting blade also includes an intermediate face in the pocketed cutting portion, the intermediate face being spaced from the first face at a distance that is less than the spaced distance between the first and second faces, whereby the cutting blade has a cutting edge in the pocketed cutting portion that extends along the lower end of the cutting blade, the cutting edge being surrounded at the lower end of the cutting blade by the massive portion of the cutting blade.
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