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.

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。

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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.

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。

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