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On the base of practical transformer substation main connection,electriccomponents and system circuit model are first formed in the paper;analyze vacuum arccharacteristic and medium resume are analyzed,then,according to vacuum chamberphysical process of switching AC arc,resume process are divided into three stages:sheathdevelopment,neutral particles diffusion and static characteristic,with that,calculatingmodel of medium resume strength is erected and applied in the computing of vacuumcircuit breaker interrupting transform overvoltage;In the paper,Saber software is used tosimulate a whole switching process;As follows,overvoltage characteristic of vacuumcircuit breaker switching no load and load transformers,kinds of influence factors areanalyzed in detail;At last,vacuum circuit breaker switching capacitance groupovervoltage formative causes and electrode refining for lessening reignition are discuss.

本文针对中低压变电站的实际主接线建立各电气元件及系统的电路模型;在真空电弧的特点及间隙的介质恢复特性上,依据真空断路器灭弧室分断电弧的物理过程,将真空电弧熄灭后的恢复过程分为鞘层发展、中性粒子扩散和静态特性三个阶段,建立了相应的介质恢复强度的计算模型,应用到切除变压器操作过电压的计算中;采用Saber仿真软件模拟计算真空断路器切除变压器操作过电压;并分别对真空断路器切除空载及负载变压器操作过电压的特点与影响操作过电压的各种因素做了详细的分析;最后简要分析了真空断路器开断电容器组过电压的形成原因及为减少重燃的电极老炼措施。

The heat pipe technology is one of the most efficiency method to solve the key technique for hard problems in order to gain high efficiency of resource utilization and good economy benefit in the application of renewably energy,In this paper,characteristics of the heat pipe technique is introduced,and its application and exploration in the solar energy,subterranean heat energy,living material energy are reviewed.

笔者结合热管技术特点,综述了其在太阳能、地热能、生物能三大能源利用领域中的国内外进展。1热管技术的技术特点[1](1)高的导热性。热管内部主要靠工作液体的汽液相变传热,热阻很小,因此具有极高的传热效率。(2)优良的等温性。

Manufactured with imported monoblock tungsten steel, double-edged design and precise grinding technology, it holds such features as no chip adhibited at bottom, lucent and clarified at both sides, permanent rustless of cutter body and long life etc under processing.

特点:本刀具旨在提高产品加工质量和效率,它采用整体进口钨钢制造,双刃设计,精密的刃磨工艺,在加工字体中有底部不留屑,两边光洁透亮,刀体永不生锈,使用寿命长等特点,而且它的刚性上焊接刀具的5倍,这样大大可以加工雕刻速度,再有它可以重复修磨使用,一把刀具至少可以使用一年以上。

Objective To investigate the MRI findings and clinical features of sellar glioma.

目的 探讨鞍区胶质瘤的MRI特点及临床发病特点

Objective To study the MRI findings and the clinical features of the juvenile pilocytic astrocytoma of sellar region.

目的 分析发生在鞍区的青少年毛细胞星形细胞瘤的MRI特点及临床发病特点

This article introduced network advertisement's each type, discussed shallowly the respective characteristic , has analyzed network advertisement's characteristic, the superiority.

本文在介绍网络广告的各种类型的基础上,浅谈了各自的特点,分析研究了网络广告的类型和特点

After a study of its origin and morphological analysis and a comparison with the Mongolian dance of Bo, the author reaches a conclusion on the characteristics and Manchu Shamanistic dance and the cultural background.

通过对萨满舞蹈的源流追溯、形态分析以及与蒙古族&博&舞特点的比较,归纳出满族萨满舞蹈的特点,并解读其文化成因。

To deeply study the historical process and development tendency as well as characteristics and regularities of the sinification of Marxism is a long-term, radical task for the construction of the CPC and the socialism with Chinese characteristics.

深入地研究马克思主义中国化的历史进程和发展趋势以及特点和规律,是中国共产党建设、中国特色社会主义建设的一项长期的和根本的任务。本文试图从宏观的角度来论述马克思主义中国化的特点

The demand that can carry investigation first and inspires a client (patulin ate not certain can sleepy), let its know product characteristic next (eat buildup by day not sleepy; is nightly eat black piece sleep spicily), such ability are in likely prescription or when buying, the drug that specific aim ground chooses to have this characteristic .

可以先通过调查并启发出客户的需求(感冒药吃了不一定会磕睡),然后让其知道产品特点(白天吃白片不磕睡;夜间吃黑片睡得香),这样才有可能在处方或购买时,有针对性地选择有此特点的药品。

In this article are introduced three raw materials in spinning wool on cotton spinning frame, analyzed the spinnable count、length limit and spinnability of thus spun wool yam as well as the spinning technology and described the main product and its properties of thus spun wool yarn on cotton spinning frame. The draft technology of the top is also discussed.

文中介绍了羊毛棉纺工艺常用的细羊毛、毛条和细化毛三种原料;分析了羊毛纺纱的可纺支数、长度限制及可纺性;分工艺研讨了羊毛在棉纺设备上的纺纱工艺,并对毛条牵切拉断工艺的特点和滑溜牵伸的应用作相应的讨论;叙述了当前棉纺设备上纺制的羊毛混纺纱主要产品及其特点

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推荐网络例句

Lugalbanda was a god and shepherd king of Uruk where he was worshipped for over a thousand years.

Lugalbanda 是神和被崇拜了一千年多 Uruk古埃及喜克索王朝国王。

I am coming just now,' and went on perfuming himself with Hunut, then he came and sat.

我来只是现在,'歼灭战perfuming自己与胡努特,那麼,他来到和SAT 。

The shamrock is the symbol of Ireland and of St.

三叶草是爱尔兰和圣特里克节的标志同时它的寓意是带来幸运。3片心形叶子围绕着一根断茎,深绿色。