查询词典 helical

Spiral steel pipe company's existing production lines, two of hot-rolled seamless steel pipe production line and four thermal expansion seamless tube production lines, the production φ219-1820 double-helical SAW pipe joints 200,000 tons,φ57-377 seamless hot-rolled 200,000 tons of steel pipes,φ377-630 thermal expansion Seamless Steel Tube 60,000 tons, product implementation SY/T5037, GB/T9711, GB/T8163, API 5L, API 5CT standards, widely applicable to oil and natural gas industry, chemical industry, general Fluid transport and infrastructure projects such as a bridge piling, sells to 27 provinces, municipalities and autonomous regions, and over 700 sales outlets, the reliable quality and high quality services to our customers has won the recognition and welcome.

公司现有六条螺旋钢管生产线、两条热轧无缝化钢管生产线和四条热扩无缝管生产线，年生产φ219-1820螺旋缝双面埋弧焊钢管20万吨、φ57-377热轧无缝化钢管20万吨、φ377-630热扩无缝钢管6万吨，产品执行SY/T5037、GB/T9711、GB/T8163、API 5L、API 5CT标准，广泛适用于石油天然气工业、化学工业、普通流体输送及桥梁打桩基建工程等，销往全国27个省、市、自治区，700多个销售网点，可靠的质量和优质的服务赢得了广大客户的认可和欢迎。

Double-helical gear.

大字齿轮。

Enroller performed both the inhale-exhale helical CT examination and pulmonary function test within one week.

肺功能检查和定量CT检查均在1周内完成。

Objective: To investigate the value of multi-slice CT enterography in intestinal diseases. Methods: Helical CT scans were performed in 36 patients before and after infusion of contrast medium.

目的：探讨多层螺旋CT小肠造影对小肠病变的诊断价值方法：对36例疑有小肠病变的患者行螺旋CT平扫及增强检查。

Two novel spherical helical antennas can be designed by projecting the planar equiangular spiral antenna onto the surfaces of hemisphere and partial sphere. Their radiation properties are analyzed by the moment method with curved basic and testing function, and the curves of the VSWR, gain, polarization and pattern vs.

将平面等角螺旋天线投影到半球面和部分球面上，可得到两种新型球面螺旋天线，采用基于曲线基函数的矩量法对其辐射特性进行了分析，给出了天线的驻波、增益、极化及方向图等随频率变化的曲线。

Therefore this imaging system can realize two kinds of X-ray radiology: reverse geometry X-ray and X-Scan imaging, and several CT scanning methods, such as equiangular fan-beam CT, equispatial fan-beam CT, helical/spiral CT, cone-beam CT with circle orbit, cone-beam CT with circle-plus-line orbit.

这样就可以实现倒置结构的X射线成像方法、等角扇束的扫描方法，以及本文所提出的凹面源加点探测器的锥形束扫描方法，而且还避免了使用成组点探测器带来的性能不一致性。

In Newtonian mechanics, the motion of the charge in magnetic field is in equidistance helical line. It is composed of the uniform motion in magnetic field and the circular motion vertical to the magnetic field.

带电粒子在磁场中的运动，如果用经典力学分析，它做等距螺旋运动，是在垂直磁场平面内两个相互垂直方向的简谐振动和沿磁场方向匀速运动的合成。

The meshing of face gear drive with helical pinion was investigated.

主要研究了修形面齿轮副传动的啮合特性。

The new approach of design of high contact ratio of face gear drive with good dynamic performance are based on application of profile crowning for both tooth surfaces and longitudinal crowning for helical pinion surface.

这一新办法的设计的联系比面对齿轮传动具有良好的动态性能的基础上的应用简介加冕为齿面和纵向加冕螺旋齿轮表面。

In order to compute the converse of Laplacian algorithm rapidly, the theory of helical spectral factorization method is applied.

为了实现其中Laplacian算子的快速求逆，文中引入Claerbout螺旋坐标系谱因式分解理论。

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸，那乌黑、忧郁的眼睛，她便会相信，他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失