杆

This paper discusses the work principle of elastic vibrating- rod sieve, and through the transformation of the existing circular sieve-shakers, illustrates the functions of elastic vibrating-rod sieve in the process of the fine screening of moist coal , and points out some existing problems and developing directions in the future.

论述了弹性振杆筛的工作原理，通过对现有圆振筛的改造，阐明了弹性振杆筛在解决湿煤细筛分过程中的作用，并指出了存在的问题及今后的努力方向。

A rod with noncircular cross section and a rod with circular cross section and intrinsic curvature are under investigation.

以非圆截面杆和有原始曲率的圆截面杆为研究对象。

In this paper,on the basis of the closed loop circuit equation of the equivalent plant mechanism,a design equation of space four-bar mechanism is set up.

本文在当量平面机构回路闭合方程的基础上建立空间四杆机构的设计方程，为叉角90°的空间四杆机构设计的研究提出了又一方法。

H. pylori is usually spiral-shaped, it can turn from rod form to coccoid shape after prolonged in vitro culture or antibiotic treatment.

幽门杆菌的菌体形态以螺旋杆状为主，但体外培养时间过长或是在抗生素处置的情况下，会造成菌体的形态由杆状变成球状。

The effect of main screw parameters (length/ diameter ratio, helix angle, channel depth and compression ratio)of cold feed rubber extruder on extrusion temperature were investigated by orthogonal regression method on the basis of the statistical analysis of experimental results.

研究了螺杆造型（长径比，螺旋升角，螺槽深度，螺杆几何压缩比），挤出工艺和胶料种类对橡胶冷喂料挤出机挤出温度的影响，并对各实验因素及实验结果做了统计分析，得出了他们之间的定量数学模型。

Colfax Corporation, which specializes in critical fluid-handling products and technologies, responded, with a portfolio of pump technologies that delivered the reliability and durability required for operation in some of the most remote oil fields in the world, and provided the company with a complete engineered system of two-screw and progressing cavity pumps operating in series.

科尔法石油公司，专业的流体设备制造商，旗下的泵产品具有耐用性和可靠性，可应用于全球偏远地区的油气田，自带双螺杆操作系统和螺杆抽油泵操作系统。

From the motion equation of the bar which vibrates one-dimensionally and longitudinally, the model of mechanical four-terminal network and the transfer equations are set up, and the natural frequency equation of coniform horn and the ratio of speed of vibration are derived.

从变截面杆作一维纵振动的运动方程出发，建立机械四端网络的数学模型及传输特性方程，导出了圆锥形变幅杆的频率方程和振速比。

Input the equation and other related parameters of space curve of driving tine by the system interface, then the equation and other parameters of space curve of the conjugate driven tine could be given by automatic design and calculation in the system.

通过系统界面输入主动轮钩杆的空间曲线方程及其他有关参数，此系统可以自动设计计算得到与其共轭的从动轮钩杆的空间曲线方程及其他参数。

Secondly, it analyses the line type between stator and rotor of PDM, gets its derivation bone line equation that satisfies the motor conjugate line type of theoretical sealing and the equation of curved surface, and determines its basic processing method and technology according to the line type characteristic of the spiral curve through analyzing some kinds of typical spiral curve processing methods.

其次，对螺杆钻具定子与转子进行线型分析，推导出其满足理论密封性的马达共轭线型的骨线方程和曲面方程，根据螺杆钻具定子内孔螺旋曲线的线型特点，在分析了几种典型的加工螺旋曲线加工方法的基础上，确定了其基本的加工方法和工艺。

By using the flank profile normal method of the plane engagement theory, the characteristic of the conjugate line pattem of the screw-liner pair on the single head single screw hydraulic machinery is investigated, and its geometric curvature, conugate line shape and slide cocfficient are analyzed.

利用平面啮合理论的齿廓法线法研究了单头单螺杆水力机械螺杆－衬套副的共轭线型特征，并对其几何曲率、啮合线形状和滑动系数等基本特性进行了分析。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。