基圆(Basic Circle):绘制渐开线齿形时作为基础之圆. 齿根圆(Dedendum Circle):通过齿根之圆. 节距(Pitch):相邻两齿间相对应点的弧线距离.
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dedendum circle diameter 齿根圆直径
The measuring instrument can measure addendum circle and dedendum circle diameter of odd-tooth gears.
这种测量工具用以测量奇数齿齿轮的齿顶圆和齿根圆直径。
Abstract: this paper designs a measuring instrument which can measure addendum circle and dedendum circle diameter of odd_tooth gears and can define all main parameters of gears.
文摘：设计了一种测量工具，用以测量奇数齿齿轮的齿顶圆和齿根圆直径，以便确定齿轮的主要参数。
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