The applied interpolation method adopts quintic spline and derivatives generation approach for discrete points by using quartic polynomial, which can better meet the needs of high-accuracy machining.
所提出的插补方法采用五次样条和四次曲线多项式微分法近似求取导数，能够更好的满足精确加工的需要。
CBN is an ideal tool material for finish and semi_finish turning powder superalloy. It not only ensures the high machining accuracy, but also can obtain longer tool life.
对精车和半精车而言，CBN是车削粉末高温合金的一种理想刀具材料，它不仅可保证高的加工精度，而且可获得长的刀具寿命。
This type of drill may have either three or four flutes and equal number of margins, which ensure superior guidance, thus resulting in high machining accuracy.
这类钻头可以有三条或四条出屑槽及相同数量的保证良好导向的导向边，这样使得加工有高精度。
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