空心

That was the year the Hula Hoop, a hollow plastic hoop, appeared in stores.

就在这一年，呼啦圈--一种空心塑料圈在商场里出现了。

The analysis methods and the conclusions in the paper will have referenced and instructional meaning for the tube hydroforming.

本文的分析方法和结论对于空心零件的成形将具有较为普遍的指导和参考意义。

4" ID was used for the idler gears and to support the 1/4" hollow shaft.

/ 4 "身份证是用来为托辊齿轮，并支持1 / 4 "空心轴。

And when using benzene as solvent, amorphous phosphorus nitride imide were obtained, which were consisted of microtubes, hollow balls, solid balls and square frameworks. Through adjusting reaction time and temperature, the morphology of the samples was well controlled.

进一步引入苯作为反应的溶剂，在高压反应釜中在190-250℃反应得到了由微管、空心球、实心球和四方框组成的非晶HPN〓，并通过调节反应时间和温度使产物的形貌得到了很好的控制。

The immergence of cenospheres descended the viscosity of solution, but didn't affect solution's stablility . The possible mechanism of ferrite-coating cenosphere particles was suggested.

最后作者讨论了溶胶凝胶法制备铁氧体涂层的可能的反应机理，作者认为空心微珠主要是通过物理吸附和化学吸附作用吸附胶体粒子的。

The production specification of cleaning process for hollow ingot s and the available issues of actual production have been introduced.

介绍了空心钢锭的清理生产规程和实际生产中存在的问题。

From the results the author thought that due to the lack of high quality insulator with high heat conductivity.

经分析认为，由于缺乏高性能的导热绝缘材料，目前所制作的空心阴极的冷却效果不是很好。

When an intermediate frequency electromagnetic field of 12 kW with the frequency of 2500Hz, high quality hollow billets can be gained. Horizontal electromagnetic continuous casting of copper tube blanks was proposed.

当施加功率为12kW、频率为2500Hz的中频电磁场时，得到了表面光滑、宏观凝固组织中具有高等轴晶的比率的高质量空心管坯。

It has been found that the ionization processes are determined by hollow cathode effect and local electric field.

通过研究电离过程的细节，可以认为该阶段电离过程是空心阴极效应和局部强电场共同作用的结果。

In the experiment, a powder pressedboard whose concentration of W, Mo, Co was 35%, 20%, 45% seperately was regarded as a source pole. Under the hollow cathode effection of incordinate voltage, the Ar atom was ionized to Ar+. Then the source pole and the specimen one were cleaned by a great amount of Ar+. Their temperature was increased to about 1100℃.

利用不等电位空心阴极放电效应，真空条件下被电离的Ar~+离子同时轰击源极和工件极，源极上的合金元素被溅射出来，在强烈的电场作用下，吸附到受轰击而得到清洁的工件表面上。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐