螺旋

We build the model for the enveloping worm helix parametric equation and then analyze its relations with the enveloping worm helix tooth surface equation,thus establishing the characteristic model of the involute helicoid enveloping worm′s generative gears.

渐开面环面蜗杆的三维构建属复杂曲面造型，文章在环面蜗杆螺旋线参数方程建模的基础上，分析讨论了其与渐开面环面蜗杆螺旋齿面方程的对应关系，建立了渐开面包络环面蜗杆产型齿的特征模型。

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。

At the same time this paper introduced the surface craft to resist wear of the plastic extruding machine's screw which was similar to the expeller by the contour structure and the working condition in domestic and foreign,pressed out the screw development and the improvement to provide the oil .

介绍了螺旋榨油机榨螺表面抗磨工艺的研究现状，分析了各种工艺的优缺点及研究进展情况；同时介绍了外形结构、工作状况与榨螺相似的塑料挤出机螺杆表面抗磨工艺的研究动向及进展情况，以期为我国螺旋榨油机榨螺表面抗磨工艺的改进提供借鉴。

This paper mainly analyses the properties of spiral fluted taps and studies how to select geometric parameters of the tap M36 in design.

本文主要对螺旋槽丝锥的特性及M36螺旋槽丝锥设计中几何参数的研究进行论述。

Up to now, the use and manufacture of spiral fluted taps is seldom seen in our country, The design of spiral fluted taps with a large diameter is still in the reseach stage.

目前，螺旋槽丝锥在我国的制造和应用还很少，而大直径螺旋槽丝锥的设计至今仍处于探索阶段。

The feasibility of using approximate function p in the analysis of forging procedure of screw press is discussed.

本文阐述了研究螺旋压力机锻击过程的分析法，探讨了应用近似函数型P曲线分析螺旋压力机锻击过程的可行性。

Cross-shaped spiral blade to blade gill net is a gill net made of spiral-shaped cross-protection net, mainly for fencing, doors and windows for protection and military defense.

螺旋交叉形刀片刺网是一种把刀片刺网做成螺旋交叉型的防护网，主要用于围栏、门窗的防护和军事防御等。

Objective To explore the value of helical CT scan in the diagnosis of gall bladder carcinoma.Methods The characteristic CT findings in 23 patients with gall bladder carcinoma were reviewed.

目的 探讨螺旋CT 期增强扫描在胆囊癌诊断中的作用方法对23例经病理证实的胆囊癌患者的多期螺旋CT表现进行回顾性分析。

To simplified the designing, diagram presentation, construction and profile of helicoidal stair, the formation of helicoid is analyzed, and it′s mathematical model is studied.

为简化旋转楼梯的设计、图示、施工及剖面形状，对螺旋面的形成进行了分析，建立了螺旋面的数学模型。

To simplified the designing, diagram presentation, construction and profile of helicoid al stair, the formation of helicoid is analyzed, and it′s mathematical model is studied.

为简化旋转楼梯的设计、图示、施工及剖面形状，对螺旋面的形成进行了分析，建立了螺旋面的数学模型。

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