圆锥楔形体的结构至少有四个圆锥面组成，在每个面上，可以使用相同的横截面，也可用不同的横截面。
Their conical sphenoid part, for the configuration of which at least four conical surfaces are used, can have the same cross section all over its length or different cross-section per parts.
计算了椭圆锥面后刀面刃磨钻尖的结构参数，分析了锥面机构参数以及刃磨参数对钻尖结构参数的影响。
The drill point structural parameters of ellipse cone flank grinding are calculated. The influence of cone structural parameter and grinding parameter to drill point structural parameter is analyzed.
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