接触表面

The mechanical measurement is to use an indicator to measure the surface or the edge of the testing lens mounted in a specific holder in a contact way. The principle of the optical measurement is the geometric optics, utilizing the properties of refraction or reflection of light to detect the centering error of the testing elements in a contactless way.

机械式的测量是利用指示器配合治具对待测透镜之外缘或表面进行接触式测量；而光学式的测量原理则是利用几何光学的折射或反射性质，对待测元件进行非接触式的偏心误差量测。

In developing such devices, thermally stable, low-resistance ohmic contacts with good surface morphologies are essential.

在开发器件过程中，制备热稳定性强、接触电阻低、表面形貌良好的欧姆接触是关键工艺步骤之一。

The two elements of a lower pair have theoretical surface contact with one another, while the two elements of a higher pair have theoretical point or line contact.

两个低副部件具有相互间的理论上的表面接触，而两个高副部件具有理论上的点或线接触。

He then compared the two to make contact with the sliding surface relative to the surface of one of the imposition of a shear force to overcome molecules between gravity and cut the actual contact area generated by contact, causing friction .

然后，他比较了两个好联系与滑动面相对表面上的一个强加的剪切力，以克服分子之间的重力和切实际的接触面积，所产生的接触，造成摩擦。

The rapid solidification and grain growth of molten bath of laser surface remelting TA15 titanium alloy was a process of directly epitaxial growth of the b grains of the unmelted substrate at the contact of the melt-pool bottom.

分析表明，TA15钛合金激光表面重熔熔池的快速凝固是一个以熔池底部热影响区顶部与熔体接触的未熔母材b晶粒为衬底的直接外延生长过程，因此热影响区顶部与熔体接触的未熔母

Yield rule, intensify rule, fluxion rule, types of contact and diathermanous model of metal cutting were also analyzed detailedly.

本文在直角自由切削过程分析的基础上，讨论了金属切削过程中的弹塑性变形理论和温度场理论，详细分析了屈服准则、强化准则、流动准则、金属切削传热模型、接触类型等问题，并利用有限元的基本思想，建立了直角自由切削应力场和温度场的有限元模型，进行了状态非线性、材料非线性和几何非线性的热力耦合分析，重点研究了切屑分离标准的确定、表面接触类型的处理等问题。

Based on the analysis of the process of free orthogonal metal cutting, the theory of elastic-plastic distortion and temperature field was discussed. Yield rule, intensify rule, fluxion rule, types of contact and diathermanous model of metal cutting were also analyzed detailedly. The FEA model of stress field and temperature field of free orthogonal metal cutting were established by the fundamental idea of FEA. State nonlinear, material nonlinear and geometry nonlinear thermal-stress coupling were analyzed by FEA technology. The separate criterion of chip and dispose of contact types were research emphatically.

本文在直角自由切削过程分析的基础上，讨论了金属切削过程中的弹塑性变形理论和温度场理论，详细分析了屈服准则、强化准则、流动准则、金属切削传热模型、接触类型等问题，并利用有限元的基本思想，建立了直角自由切削应力场和温度场的有限元模型，进行了状态非线性、材料非线性和几何非线性的热力耦合分析，重点研究了切屑分离标准的确定、表面接触类型的处理等问题。

The movement of the water-cooled mould relative to the ingot is essentia...

同时认为，对于抽锭式重熔过程来讲，结晶器与钢锭之间的相对移动，实际上是接触钢锭表面的渣壳内侧渣璧相对于被拉裂的与结晶器接触的渣壳外侧渣壁的剪切运动。

The results indicate that the temperature at the surface of roller contacted with bar increases rapidly at the beginning of rolling, and it tends to periodically vary along with the rolling process, and this process will cost about 2 h. The temperature of the roller surface reaches the top point which is about 300 ℃ when the roller is circumrotated to position contacted with bar. New assembled milling rolls have excellent result in milling process.

研究结果表明：与轧件接触的轧辊表面的温度在开始轧制时迅速上升，随着轧制过程的进行，温度趋于呈稳定周期性变化，温度达到稳定的时间大约为2 h；当轧辊旋转到与轧件接触处，温度达到最高，最高温度约为 300 ℃，此时辊套轧辊结构稳定，据此生产的组合式轧辊在轧制过程中性能优越。

A APDL program is developed for analyzing the contact stress of journal bearing pair of roller cone bit. The 25 contact stress cases of different clearance fit(including clearance of large bearing is bigger, equal to and smaller than that of small bearing) journal bearing pair of the 8 1/2XXX roller cone bit are analyzed. The result is that the maximum contact stress is less when the clearance of large journal bearing pair is smaller than or equal to that of small journal bearing pair.

用参数化设计语言APDL编制了牙轮钻头滑动轴承的ANSYS接触有限元分析程序，根据钻头制造厂方提供的某8 1/2的轴承配合间隙尺寸，分三种不同的间隙配合（大轴间隙大于小轴间隙、大轴间隙等于小轴间隙、大轴间隙小于小轴间隙），共25种情况，对轴承的表面的接触应力进行了分析，得出：大轴间隙小于等于小轴间隙时最大应力比较小。

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷