在螺旋锥齿轮硬齿面精加工这一环节上，我国与发达国家的差距尤为明显。
There is an obvious disparity between our nation and other developed nations in the field of hard surface finish machining of the spiral bevel gear.
渐开面包络环面内螺纹蜗杆砂轮磨齿，是一种硬齿面齿轮精加工的新型工艺。
Grinding gear with the toroidal involute interior thread worm grind wheel is a new kind of process in hard surface gear finish machining.
渐开面包络环面内螺纹蜗杆砂轮磨齿，是一种硬齿面齿轮精加工的新型工艺。
A worm grinding wheel used to grind gear wheel is designed to increase the gear precision.
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