| 摘要 |
<p>A saw blade where there are three or more differences in the heights of tooth top sections, tooth top sections having cutting tooth corners (23, 27) with an angle of 90º or less are arranged in at least two stages, a sawtooth (15A) with the maximum cutting width has a dovetail shape and the angle of the cutting tooth corner (27) at the tooth top section of the sawtooth (15A) is 90º or less, and the angle of a cutting tooth corner at a tooth top section of a sawtooth (13A) with the second largest cutting width is 90º or less. Further, the sawtooth (13A) having the second largest cutting width is dovetail shaped. Half or more of the number of the saw teeth of one sawtooth group of the saw blade have a cutting tooth corner angle of 90º or less.</p> |
