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On the basis of theoretical analysis to interrupting process in low voltage circuit breaker, a chain arc model is set up for magnetic field driven arc in arc chamber.

本文对低压断路器的开断过程进行了详细的理论分析,提出了一种低压断路器的链式电弧动态数学模型。

ABSTRACT A chain arc model is set up for magnetic field driven arc in arc chamber of low voltage circuit breaker in the paper.

针对低压断路器灭弧室中的磁驱电弧建立了链式电弧数学模型。

The thesis expounds the necessity of application of arc prolong measure in synthetic test,introduces general practices of arc prolong methods and their working principle at home and abroad,and proposes design criteria and parameter calculating method for arc prolong circuit .

论述了合成试验采取延弧措施的必要性,介绍了国内外大功率试验室通用的延弧方法和工作原理,提出了延弧回路的设计原则和参数计算方法,并对影响延弧效能的因素进行了分析,最后叙述了提高延弧成功率的措施以及今后可能出现的问题。

In the same circle or congruent circles, the circumferential angles opposite to the same arc or the equal arc are equal, and equal to half of the central angle opposite to the arc; The arcs opposite to the equal circumferential angles are equal.

在同圆或等圆中,同弧或等弧所对的圆周角相等,都等于该弧所对的圆心角的一半;相等的圆周角所对的弧相等。

Pass to expati at e the characteristics of segment double circular arc gear, introducing the appl ication of segment double circular arc gear in turbine compressor, It presented that segment double circular arc gear in the high speed and large deeply turbi ne compressor was necessary.

通过阐述分阶式双圆弧齿轮传动特点,介绍了分阶式双圆弧齿轮在透平压缩机中的应用,说明在高速、型透平压缩机中采用分阶式双圆弧齿轮是必要的。

We present two methods for generating a segment of circular arc by the vector valued continued fractions. Based on this method we construct a parametric rational arc spline that is GC〓 continuity. By adjusting the given tangent vector, this parametric rational arc spline also has convexity preserving property and monotonicity preserving property.

本文利用向量连分式给出了两种快速生成圆弧的新方法;在此基础上,本文还构造了一种GC〓连续的可调参数有理圆弧样条,在实际操作中,通过调整一侧端点的切向量,可使上述圆弧样条曲线保凸,保单调。

Our company's main products include: automatic submerged arc welder, CO2 shield welder, argon arc welder, manual arc welder, resistance welder, plasma cutter, contravariant welder and vacuum power source and crude oil heating power source, etc.

公司主要产品有:自动埋弧焊机、 CO2气体保护焊机、氩弧焊机、手弧焊机、电阻焊机、等离子切割机、逆变焊机及真空电源和原油加热电源等。

The intermediate-basic volcanic rocks with SiO2 content less than 57.48 wt% are high in Al2O3(20.22-16.34 wt%) and K2O, enriched in large ion lithophile elements, show obvious Nb, Ta negative anomaly, these are same to the basalts which formed in island arc. The andesite, dacite and rhyolite rocks with SiO2 content between 62.11-75.19 wt%, are similar with the I-type granitic rocks formed in island arc in their geochemistry. It is suggested that the Jueluotage area of East Tianshan was in island arc setting during Late Carboniferous, when the subduction of the ancient Asian Ocean was in progress.

其中w(SiO2)小于57.48%的中基性火山岩具有高w(Al2O3)(16.34%~20.22%),较富钾,富集大离子亲石元素,具明显的Nb、Ta负异常;w(SiO2)介于62.11%~75.19%之间的安山岩、英安岩和流纹岩岩石化学特征与准铝质的Ⅰ型花岗质岩石相似,其地球化学特征也反映出岛弧花岗岩的特点,表明东天山觉罗塔格地区路白山一带在晚石炭世仍处于古亚洲洋向南俯冲的岛弧环境。

For the production of double boiler industry cycloid arc Gear series, double-arc cycloid involute gear tooth series, double cycloid arc Gear three series reducer is the slowdown in industry experts examine bodies comprehensive demonstration of the industry Reducer various features of the design of new models, it has a reduction ratio, low noise, high efficiency, long life, small size, light weight, style, new structure is simple, reliable transmission, less power consumption, easy operation and maintenance, and other characteristics, Is designed for the boiler industry with stereotypes products.

专为锅炉行业生产的双摆线圆弧齿齿轮系列,双摆线圆弧齿渐开线齿轮系列、双摆线圆弧齿行星三轮系列减速机是经减速机构行业专家考查论证综合各行业各种减速机特点设计的新机型,它具有减速比大、噪音低、效率高、寿命长、体积小、重量轻、样式新颖结构简单、传动可靠、耗电少、易操作维修等特点,是专为锅炉行业配备的定型产品。

When τ's value was less than 0.1, the HCVAW arc was exhibitive of diffusedshape with lower energy density instinct; and when τ's value was higher than 0.5,the arc was a fine-constricted arc with higher energy density.

在电弧电流密度超过临界值时,电弧自生磁场对电弧产生的收缩作用超过了电弧中各种粒子的扩散作用,HCVAW电弧由此而发生了形态上的转变。

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I didn't watch TV last night, because it .

昨晚我没有看电视,因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来,在北京的很多小区里,电梯液晶电视被撤了下来。

I'm running my simile to an extreme.

我比喻得过头了。