| 摘要 |
These rotary cutters for cutting teeth in rotating cylindrical workpieces contain cutting teeth inclined to the peripheral direction of the cutter and arranged in two or more circles about the cutter axis. Said circles have different positions axially of the cutter. Each of said circles contains identical cutting teeth different from the cutting teeth of the other circles. Preferably the cutting teeth extend lengthwise at a constant distance from the cutter axis, along helices.
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