deviation of flank angle
螺旋线轴向误差 helix error in the axis 牙侧角偏差 deviation of flank angle 螺距误差中径当量 pitch diameter equivalent of error in pitch ..
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本文考虑了非对称三角形螺纹的螺距偏差和牙侧角偏差的各种组合对作用中径的共同影响，运用了包容图位移法，分析和推导出非对称螺纹作用中径的精确计算公式。
By the use of the displacing enveloping drawing method, a set of exact formulae for calculating the virtual pitch diameter is deduced and verified by measured data.
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