Diametral pitch : the number of teeth per inch of pitch - circle diameter.

径节 --- 节圆直径每英寸长度上的齿数.

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Flank: the surface between the pitch circle and the bottom of the tooth.

齿腹 --- 节圆与齿槽底部之间的轮齿表面.

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Pitch Point is the intersection of the spline tooth profile with the pitch circle.

节点是键齿的齿廓与节圆的交点.

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Face : the surface between the pitch circle and the top of the tooth.

齿面 --- 节圆与齿顶之间的轮齿表面.

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