main pitch circle
... standard pitch circle 分度圆 ; 基准节圆 ; 准节圆 main pitch circle 法周节 thickne on pitch circle 节圆齿厚 ...
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... 标称节径 normal circular pitch 法周节 normal circular pitch 法圆锥 normal cone ...
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法向周节 [机] normal circular pitch
推测的法向周节与实际测量值不同。影响周节错误的最主要因素是齿轮侧面有凹槽。
It is the difference between theoretical normal pitch and its actual measured value. The major element to influence the pitch errors is the runout of gear flank groove.
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