The paper points out that the finish error of blades does not conform to normal distribution law, hence the error probability distribution function is derived for this specific process.
本文指出了叶片精加工的误差不符合正态分布规律，并推导了叶片精加工的误差概率分布函数。
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It is verified that in the function of normal distribution can be expressed the density law of the rock structure crevice group and the calculation error is minor.