螺旋

A simplified computing method for radiated fields of the curvilinear antenna is presented.

基于简化计算方法，分别得到了圆柱螺旋线和角锥螺旋线的辐射场，并给出了高斯脉冲电流激励时的几个数值计算的实例。

Gain-scheduling flight control law is used to determine the deflexion angles of the control surface and control the trajectory of the vehicle, and the trajectory simulation results are obtained. The results indicate that under the control system the latter is complicated, so direct acceleration is superior.

结果表明，操纵控制下的飞行器能够按照预定轨迹飞行；使用螺旋加速方式，可以延长激光加速的时间，但是这两种加速方式最后得到的速度差不多，而螺旋加速的操纵复杂，因此竖直平面内直接加速有一定的优势。

Generally, B in the configuration closest cell's DNA conformation, it and the double helix model are similar. A-DNA and when RNA member double helix area as well as duplication forms the DNA-RNA hybrid molecule conformation is close. Z-DNA take the nucleotide dimer as the unit left-hand winding, its principal chain assumes the denticle the shape, therefore.

一般认为，B构型最接近细胞中的DNA构象，它与双螺旋模型非常相似。A－DNA与RNA分子中的双螺旋区以及转录时形成的DNA－RNA杂交分子构象接近。Z－DNA以核苷酸二聚体为单元左向缠绕，其主链呈锯齿形，故名。

This thread combined laevogyrate thread and dextral thread together in the same part of the thread.

发明了一种新型螺纹—唐氏螺纹，这种螺纹采用的是变截面非完整螺纹，并且将左旋和右旋螺旋线复合在同一段螺旋线上，具有左、右放螺纹的特点，可分别与左、右旋螺纹配合。

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。

In the proton NMR spectra of nicotine, all proton peaks of nicotine moved to downfield, the resonance emanating from nicotine preferentially broadened.

尼古丁与两种蛋白相互作用，改变了尼古丁的化学位移，并使得〓H NMR峰的分辨率降低，峰变宽。尼古丁诱导蛋白质的二级结构改变，血红蛋白α螺旋结构减少，并出现一个新的子峰；白蛋白的α螺旋也减少。

Double spiral is more advantageous to part liquid dreg and not easy to block.

分离方式：采用阿基米德螺旋离心分离，双螺旋更利於渣液分离，不易堵塞

The company mainly produces auto transmission and driving axle spiral bevel gears with the production capacity of 110 thousand units and 160 thousand sets.

主要生产汽车变速器和后桥螺旋伞齿轮，具有年产11万台轻型车变速器和16万套后桥螺旋伞齿轮的生产能力。

The company mainly produces auto transmission driving axle spiral bevel gears with the production capacity of 110 thous units 160 thous sets.

主要生产汽车变速器和后桥螺旋伞齿轮，具有年产11万台轻型车变速器和16万套后桥螺旋伞齿轮的生产能力。

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。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了