传统机床加工螺旋齿轮必须附加螺旋导轨，导致成本高昂。

The traditional machine tools use additional helical leaders to machining helical gears, so the cost is expensive.

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因此，利用数字控制取代螺旋导轨，实现斜齿插削加工的CNC控制具有重要的现实意义。

So using CNC substitute helix track and realizing bevel wheel's shaping CNC have important realism meaning.

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