清渣容易、回转阻力小、钻进速度快。
Drilling fast, easy slag, the smaller the turning resistance.
此外还讨论了转向架回转阻力的定义和标准。
Furthermore, the definitions and standards of rotary resistance of bogies are discussed.
加速度测试法的先决条件是确定列车基本阻力、回转质量系数和列车质量，而其测试关键是列车加速度的测定。
The precondition of the acceleration testing method is the determination of the train resistance, rotary mass coefficient and train mass. The crucial test is measurement of train acceleration.
为了研究轴对称回转体水下航行器模型所受到的壁面摩擦阻力，设计并实施了一套测试系统。
A testing system was designed and implemented to figure out the friction drag of an underwater axisymmetrical vehicle model.
本文利用现代流体力学计算技术，采用复合形法(COMPLEX)，对八维参量的回转体最小阻力外形进行优化设计。
Based on the modern digital technology of fluid mechanics, the eight-parameter optimum axisymmetric bodies for minimum drag are obtained by using COMPLEX method.
本文主要根据模型试验研究的结果，介绍防溅条对高速排水量艇的阻力、横摇、纵摇、升沉、失速及回转性能等方面的影响。
Based on results of the model test, the influence of chine strips on resistance, rolling, pitching, heaving, loss of speed in wave and turning qualities of this form is discussed.
超空泡减阻机理的研究表明：超空泡不仅可以减小回转体的摩擦阻力，还可以减小回转体的压差阻力。
Research on drag reduction mechanism of supercavitation shows that supercavitation can reduce not only the friction drag coefficient but also the pressure drag coefficient.
通过数值计算方法，模拟回转体在水下的航行，分析回转体周围流场、压强及其壁面上阻力的分布，并根据计算结果为该回转体设计了有效的微气泡减阻方案。
The flow field surrounding the revolving object, pressure and resistance distribution on its wall were calculated in order to design a micro-bubble reducing resistance scheme for the revolving object.
前言：在冲击—回转式凿岩机向岩石钻进过程中，旋转中的钻具承受着两种力矩的作用：一是驱动其旋转的动力矩；二是被钻岩石阻止其旋转的阻力矩。
In rock drilling process with percussion-rotary drill rotating drilling tool bears two toques: dynamic torque which drives drilling tool into rock mass, and resistance torque of rock mass.
基于回转式空气预热器受热面积灰程度与烟气侧流动阻力间的依赖关系及其相关影响因素，提出了折算压差的概念，推导了积灰监测的计算模型。
Based on the dependence of gas flow drag force on ash accumulation for rotary air heater, the converted pressure drop is proposed and ash monitoring model is derived.
基于回转式空气预热器受热面积灰程度与烟气侧流动阻力间的依赖关系及其相关影响因素，提出了折算压差的概念，推导了积灰监测的计算模型。
Based on the dependence of gas flow drag force on ash accumulation for rotary air heater, the converted pressure drop is proposed and ash monitoring model is derived.
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