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• Pitch diameter (d) is the diameter of the pitch circle.

直径(D)：节圆直径节圆所在圆直径。

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

节点齿齿交点

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• Particularly suitable for fixture building by direct mounting on cylinder head small pitch circle dia.

and accurate centring特别适合夹具直接安装气缸盖(小分度直径。)

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• Pitch circle is the reference circle from which all transverse spline tooth dimensions are constructed.

参考圆，花键的齿所有横向尺寸是以节圆为基础开始计算的。

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• Gears on nonparallel, non-intersecting shafts also have pitch circles, but the rolling-pitch-circle concept is not valid.

平行的齿轮，非交叉传动的节点，不存在纯滚动概念

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• Bolt circle diameter and pitch between bolt holes.

螺栓圆周直径螺栓孔间距

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• The polar equation of non-circular gear pitch curve, calculation method of center distance, formula of pitch curve length, primary circle radius and pressure Angle is given.

给出齿轮曲线极坐标方程，两齿轮中心计算方法，节曲线长度基础半径压力计算公式

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• Using the curve fitted pitch, the universal calculation module of manufacture data of non-circle gear for all kind of non-circle gear can be got more easily.

利用合后齿轮曲线，就可以使得所有非圆齿轮加工数据计算有了通用的计算模块

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• Ap (Aerial Photography) Mode removes the SAFE Circle and makes pitch and roll inputs relative to the quad's present orientation.

AP(空中摄影)模式消除安全使相对公司目前的方向俯仰滚动投入

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• Once the screw turns a circle, the liquid inside the sealing chamber will be pushed forward by a pitch.

螺杆每转一周，密封中的液体向前推进一个螺距。

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• Once the screw turns a circle, the liquid inside the sealing chamber will be pushed forward by a pitch.

螺杆每转一周，密封中的液体向前推进一个螺距。

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