Pitch diameter (d) is the diameter of the pitch circle.
节圆直径(D)：节圆直径是节圆所在圆的直径。
There are many ways to measure base-level pitch diameter of cone-shaped thread.
检测圆锥管螺纹基面中径的方法有很多，但测量过程复杂。
The pin gauges are used to measure the hole distance, the pitch diameter of the thread, etc.
针规适用于机械加工中孔径、孔距、内螺纹小径的测量，特别适于弯曲槽宽及模具尺寸的测量。
The taper and pitch diameter of API round thread casing are two of the most important parameters.
API圆螺纹的锥度和中径是两个重要的参数。
A simple, easy to use, correct and reliable for measurement of single pitch diameter of inner thread is provided.
提供了一种简便易行、准确可靠的测量内螺纹单一中径的手段。
The errors of the stand-off measurement and measurement errors made by pitch diameter gauge and ovality gauge are analyzed and compared.
分析比较了紧密距测量以及中径和椭圆度量规测量的误差。
This paper describes a new method and device for measuring helical line, pitch diameter, taper and half-angle of thread of petroleum thread gauges.
本文介绍一种测量石油螺纹量规的螺旋线、中径、锥度和牙形半角的新方法及装置。
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.
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。
Both have the same pitch diameter at the top of the hole of internal threads or end of the pipe on external threads, and both have the same thread lengths or depths.
在内螺纹的孔的顶端或者外螺纹的管的端部拥有相同的中径，而且拥有相同的螺纹长度和深度。
The principle straightness error of cutting square in work-pieces can be controlled by choosing a suitable pitch diameter of the planetary gear in the machine tools.
选取适当的车头行星轮的分度圆直径，可以有效地控制车方原理的直线度误差。
This paper deals with the interchangeability of sawtooth thread used in unidirectional heavy load and the exact fit which apply the fit specific property by means of virtual pitch diameter.
本文讨论了单向承载大、又需紧密配合的锯齿形螺纹互换性问题。
Pulleys are on the market that permit an adjustment in the width of the groove. The effective pitch diameter of the pulley is thus varied, and moderate changes in the speed ratio can be secured.
带轮运行一定时间后，槽的宽度可以调节，这样带轮的节距是变化的，因此需要进行适当的调整以满足速度比的要求。
This article brings to Light the internal relations and difference between single pitch diameter and actual pitch diameter by means of geometrical analysis of several parameters of pitch diameter.
通过对普通螺纹中径诸参数的几何分析，揭示出其单一中径与实际中径的内在联系与区别。
Bolt circle diameter and pitch between bolt holes.
螺栓圆周直径及螺栓孔间距。
From the STMimages, we could see clearly the helix pitch and helix diameter of helix structure.
由STM图象中我们能清晰地观察到螺旋结构的螺距与螺径。
Based on experimental data, the authors have studied such factors as channel structure, pitch, particle concentration and particle diameter, etc, which may have an influence on separation efficiency.
作者在实验的基础上对影响分离效率的槽型结构、节距、颗粒浓度、颗粒直径等因素进行了研究。
The two helical nanofibers have absolutely opposite helical senses, but have identical cycle number, coil diameter, coil length, coil pitch, fiber diameter, and fiber cross section.
它们具有绝对相反的螺旋旋向，但却具有相同的纤维直径，纤维截面，螺旋直径，螺旋圈数，螺旋间距，和螺旋长度。
You note that the pitch decreased and the diameter increased.
你注意到，在球场下降，直径增加。
By this model, we compare the cooling effectiveness of three methods and analysis cooling characters when reduce the diameter and pitch of the holes at the same scale.
利用该模型针对某燃烧室设计进行壁温预测，并进行了三种增大冷气量方法的冷却效果比较，研究了同比例减小孔径和孔间距的冷却特性。
In this paper, pure oxygen is used to stabilized large diameter mesophase pitch fibers, which was found to be more effective than air.
采用空气和氧气做为氧化介质对大直径中间相沥青纤维进行不熔化处理。
Based on this, the interrelations between the elastic coefficient and the structural parameters of the nanospring, such as tube diameter, spring diameter and coil pitch, are carefully studied.
在此基础上，分析了单层碳纳米弹簧的弹性常数与弹簧结构参数（如管直径、弹簧直径、簧圈节距等）间的关系；
The high pitch and short diameter prop would try to pull the airplane very fast.
高间距和短径支撑会尝试拉飞机非常快。
The dependence of the ac loss of coil-type samples on the peak value of magnetic field, magnetizing frequency, pitch of materials, matrix and diameter of filament were obtained.
得出了线圈型样品交流损耗与峰值磁场、励磁频率，材料扭矩，基体材料，细芯直径诸量间的依赖关系。
The large diameter mesophase pitch carbon monofiber in uniform size was obtained by controlling the matching of extrusion flow and drawing rate.
熔纺时控制了挤出流量和牵伸速率的良好匹配，获得了丝径均匀的大直径中间相沥青炭单丝。
A table containing values of propeller load can be used to compare propellers of varying diameter and pitch, as to the load that they impose on the engine.
的表载列螺旋桨负荷值可用于比较不同直径和可调桨，以他们的负载对发动机。
The thread parameters i. e., Major diameter, Minor diameter, Pitch, Angle and Call Out fields are not editable.
线叁数也就是，主修直径、较小的直径，程度、角度和呼叫出自领域不是可编辑的。
The limit pressure angle is related to such factors as offset angle, mean spiral angle, pitch cone angle and mean pitch cone diameter, not to geometrical shape of the tooth surface.
极限压力角受偏置角、大小轮的螺旋角、节锥角和中点的分度圆直径影响，而与齿面的其他参数无关等结论。
The simulation results indicated that heat pipe diameter, pipe length, tube pitch and fin structure had influence on the efficiency and pressure drop of heat pipe exchanger.
模拟结果表明，热管的管径，管长，管间距和翅片结构均影响热管换热器的换热效率和压力降。
The simulation results indicated that heat pipe diameter, pipe length, tube pitch and fin structure had influence on the efficiency and pressure drop of heat pipe exchanger.
模拟结果表明，热管的管径，管长，管间距和翅片结构均影响热管换热器的换热效率和压力降。
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