查询词典 elliptical

The method of punching elliptical hole on 22mm thick sheet with blanking die is introduced,which has been used in production.

但是在生产实际中常有些12mm以上的超厚板材零件，因其特殊的形状与生产量，希望能用冲裁的方式加工提高工效，并保证

In order to save water and reduce polluted water discharge,we use elliptical tube in rectangular steel fin tube which is treated in hot dipping zinc and use force cooling by blast axial flow fan to condensate the air in tube then return the condensate to boiler to form a closed circuit ,thus replace conventional water cooling tower.

采用椭圆管穿矩形钢翅片经热浸锌后组装的冷凝翅片管束，用鼓风式轴流风机强制将乏汽在管内冷凝成水返回锅炉形成闭路循环使用，从而可以取代常规开放式水冷却塔，极大地节约汽轮机运行的耗水量和污水排放量，对环境保护起到了积极的作用。

On the basis of analyzing the forming mechanism of elliptical head profile spinning a locus equation for the spinning process has been worked out. Then, proposed in a relatively systematic way is a method for the determination of the following: the parameters of the involute profile form plate for the control of a boiler head spinning, and the...

文中分析了椭圆封头仿形旋压成形机理，建立了旋压轨迹方程，较系统地提出了控制封头旋压的渐开线仿形模板参数及旋压道次间距序列的确定方法，并成功地进行了工艺试验，为回转体的仿形旋压控制参数的确定提供参考。

Both elliptical workouts and treadmill workouts will build bone density, burn fat, promote good cardiovascular health and increase your energy level.

两个椭圆训练和跑步训练将建立骨质密度，燃烧脂肪，促进良好的心血管健康，增加你的能量水平。

Numerical simulations by assemblies of circular panicles can qualitatively reflect the general characteristics of liquefaction behavior of sand. The interval effect of aspect ratio of elliptical panicle on the mechanical behavior of numerical sample is obtained, and the reason is related to the initial average co-ordination number. The regularity of evolution of fabric in the process of sand liquefaction under cyclic loading can be qualitatively achieved by using the numerical sample randomly mixed of panicles with different shapes. Numerical simulations can not only demonstrate the macro phenomenon of particle breakage, mostly importantly, it can also expose the evolution of particle breakage microscopically, and would contribute to further research of the micromechanics of particle breakage.

研究结果表明：Hertz-Mindlin非线性接触模型适用于变围压条件下砂土力学性质模拟；纯圆颗粒模拟能够定性地反映饱和砂土振动液化的一般规律；颗粒长短比变化对砂土力学性质的影响具有区间效应，其原因与粒间初始平均接触数有关；不同形状随机混合试样能够从定性规律上反映振动液化过程中砂土的细观组构演化规律；数值模拟不仅可得到颗粒破碎宏观响应，而且可以分析内部接触力变化和实现对粘结破裂位置的追踪，从而可进一步研究颗粒破碎细观力学机制。

This paper introduces structure,working principle,force analyzing and advantage of the clamp using in cutting bearing hole of coal car whee3. A system of the ultrasonic elliptical vibration cutting with the single longitudinal animation was developed.

利用这种结构研制了一套单激励超声椭圆振动车削系统，采用PCD刀具对LY12实心件和薄壁筒工件进行了精密切削实验，实验结果表明椭圆振动切削可以大幅度降低切削力，明显改善薄壁工件的形状精度，同时工件还具有较好的表面粗糙度。

It can be used as an indoor elliptical when fixed in place, and a mobility assistive device when in walking mode. The two front wheels and the rear crank wheel form a triangle to prevent it from tilting in walking mode.

本设计具有定点、定轨迹、代步等三种使用模式，不但能在室内做运动，也可到户外进行休闲、购物等活动。

Guide this process is for a fixed image of the painting process, similar window slate can draw a straight, rectangular, circular, elliptical, hexagonal, five-pointed star is the six graphics, and can be outfitted with different types of fr a me color and fill color.

程序简介本程序是一个用于绘画固定图象的程序，类似window的画板，可以绘出，直线，矩形，圆形，椭圆，正六边形，正五角星六种图形，并且可以搭配不同的边框颜色和填充颜色。

The different locations of driving tips on the horn caused different elliptical trajectories, and how variation influence on motor mechanical output is studied through FEM method. The motor got best performance when positioning driving tips on antinodes of the bending wave.

用有限元法研究了不同形态的椭圆振动轨迹对电机输出性能的影响，发现当驱动足位于弯曲驻波波腹处电机性能最稳定。

This paper analyses linguistic strategies of blurbs displayed on their website by four book companies in terms of complimenting, elliptical syntactic patterns, the imperative, the address form "you" and curiosity arousers.

本文从称赞语策略、省略句型策略、祈使句和称谓语you策略、激起好奇心策略四方面分析国外四大出版社的英文书籍推荐广告的语言策略。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。