轴面

Refraction regularity of extraordinary ray in uniaxial crystal with arbitrarily oriented optical axis;2. In the case of optical axis of uniaxial crystal being parallel with the incident plane, the angle of refraction of extraordinary ray are calculated by using Fermat's principle.

在单轴晶体的光轴与入射面平行的情形下用费马原理计算非寻常光光线的折射角，然后就怎样定义非寻常光作些讨论，最后在单轴晶体的光轴任意取向的普遍情形下给出计算非寻常光光线折射方向的公式。

The bearing part is like fish back instead customary shaft seat and can weigh different shaft load; Using fish back shaped arc surface for bearing load can overcome error brought by shaft bend and horizontal deviation.

承载部位呈鱼背状，取代原来的轴座，可进行各种轴负荷的称重；鱼背状承载弧面可克服轴受载弯曲或安装水平偏差引起的称重误差；改变弧径尺寸可适应不同轴径。

The circle shear machine 1 comprises a pair of center shafts, including an upper center shaft 20 and a lower center shaft 30, each having thrust bearing mounted sheet metal support members 25, and 35, respectively, which, when brought face together, engage on a top and bottom surface of a sheet metal blank 10, which is positioned therebetween.

The圆盘剪机器1包括一个对中轴，包括上部中轴20和一个更低的中轴有30，中的每一推力轴承登上的金属板支持成员25，和35，分别，当被带来的面孔一起，在上面时允诺，并且金属板空白10，底面被安置therebetween。

Based on that,the problem of reconstruction is studied according whether the axis-track surface is developable or not,and some valuable conclusions are derived.

在得出包络面、轴迹曲面、等效轴迹曲面互为等距曲面的结论的基础上，研究了轴迹曲面可展与不可展两种情况下的非等径包络重构问题，得到了一些有价值的结论。

Integrated with the calculation methods of soil pressure, the mechanism of soil pressure of fale is studied systematically and detailedly based on the mode of axial stress distribution of wholly grouted anchor.

在全长粘结式锚杆拉力分布模型基础之上，结合本文的土钉土压力计算方法，本文对面层土压力机理进行了系统详细的研究，提出了面层局部土压力、面层土压力及土钉最大拉力的计算公式和分布模型，理论分析和实例分析表明，本文提出的轴力分布模型和面层土压力机理是合理的，解决了面层土压力取值标准问题，为面层设计提供了定量的依掘，土钉最大拉力可直接用于土钉长度设计。

This milling machine has fixed cross-rail and column structure. The national patent technology "the new multiple guideway" and CNC universal milling head with AC axes(3axes +2axes) type are applied to it. It can realizes rotate index ±370o at AC axes. Equipped with domestic or imported CNC system and capability, the machine can realize pentahedron machining.

产品采用定梁定柱结构，刚性强；应用《新型复合导轨》国家专利技术和AC轴（3轴+2轴）型数控自动万能铣头核心技术，可实现AC轴±370o自动旋转分度；选配国产和进口数控系统，自动完成多种空间方向的加工，实现五面体加工功能。

Additionally, a method of forming a low friction piston ring is provided including applying a friction reducing surface treatment, such as tungsten disulfide, to at least one of the first and second axially facing surfaces and preventing the application of the friction reducing surface treatment on the radially outwardly facing surface.

另外，提供了一种形成低摩擦活塞环的方法，包括向第一轴向面和第二轴向面中至少一个应用减小摩擦的表面处理，例如二硫化钨，并且防止在径向外侧面上应用减小摩擦的表面处理。

Spinel is a compound of magnesia and alumina(Al2O3) and is thus a magnesium aluminate(MgAl2O4), found as accessories in igneous rocks, in metamorphosed aluminous schists, in contact metamorphosed limestones and sometimes in high temperature iore veins.

尖晶石主要成分是氧化镁和氧化铝，结晶习性是等轴晶系漂亮的正八面体。镁被铁置换就是铁尖晶石，被锌置换就是锌尖晶石，铁完全置换镁形成磁铁矿，铬置换铁尖晶石形成铬铁矿，这些类质同相的等轴晶系都是八面体结晶的尖晶石族矿物。

For many years ,by adhering to the principle of customer foremost,Shanghai Saini Company has been always engaged in the production of R series coaxial hard gear surface column gear speed reducers, S series gear worm speed reducers, F series parallel axis gear speed reducers, K series spiral umbrella gear speed reducers, RV series worm speed reducers, MB, MBN planet taper disc stepless speed variators, WH/WB series high power gear speed reducers, cycloid pin gear speed reducers and other types of universal and special speed reducers.

多年以来，上海赛尼传动设备有限公司秉着客户至上的原则，专业生产WR系列同轴式硬齿面圆柱齿轮减速机，WK系列弧齿锥齿轮硬齿面减速机，WF系列平行轴斜齿轮减速机，WS系列圆柱蜗杆减速机，RV系列蜗杆减速机，MB、MBN行星锥盘无级变速机等其他类型通用的和专用的减速机，被广泛应用于舞台机械、食品、包装、陶瓷、制药、纺织、环保等诸多领域。

Based on the critical approach, a model for multiaxial fatigue life prediction was established by combining maximum shear strain and normal strain on the critical plane, and the effect of stress state under the multiaxial cyclic loading condition on the fatigue life was taken into account.

通过对薄壁圆管和缺口试样的高温多轴疲劳寿命特性分析，基于临界面方法提出了一个的多轴疲劳寿命预测模型，在考虑临界面上最大剪应变和正应变对多轴疲劳损伤贡献的同时，还引入了应力状态对多轴疲劳寿命的影响因素。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。