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"Litz" wires are multiple magnet wires bundled together for use typically when winding high frequency transformers.

绞合线是将若干漆包线捆束一起使用,特别用于缠绕高频变压器。

SMPS ; power transformer ; litz copper foil winding ; winding loss

高频开关电源;功率变压器;双绞铜箔线圈;线圈损耗

This paper deals with the surge protection of a 220kV H—GIS and analyzes the effects of metal oxide surge attesters on reducing the incoming lightning overvolrages by means of numercal method Meanwhile, there is a kind of over-voltagey which may be rather critical for GIS, e·g·the switching surges with extremely high frequeuly produces by GIS-G switching-off of some loadless duses.

本文讨论220kV混合式GIS变电站过电压保护,用数值计算方法分析氧化锌避雷器对降低过电压的作用,并讨论了有一种类型的过电压可能对GIS要求更为严格,即在主回路中用GIS隔离开关切除空母线引起某些高频操作过电压,因此在绝缘配合时要相应考虑。

The milling and chamfering machine is a key unit in the longitudinally welded pipe production line.

铣头倒棱机是高频直缝焊管生产线上的关键设备之一。

ABSTRACT]ObjectiveTo enhance the value of high-frequency ultrasonography in differential diagnosis for mesenteric lymphadenectasis.

摘要]目的提高高频超声对肠系膜淋巴结大的鉴别诊断价值。

ObjectiveTo enhance the value of high-frequency ultrasonography in differential diagnosis for mesenteric lymphadenectasis.

目的 提高高频超声对肠系膜淋巴结大的鉴别诊断价值。

One hundred and six patients with cervical lymphadenopathy underwent color Doppler flow studies. The lymph node lesions were divided into four groups: reactive nodes, tuberculosis nodes, lymphadenoma and metastatic nodes. The vascular patterns of hilar type, central type, peripheral type and mixed type were assessed.

应用高频彩色多普勒超少诊断仪,观察106例淋巴结,将肿大淋巴结分为4组,反应性增生淋巴结、结核性淋巴结、淋巴瘤、转移性淋巴结,将血供模式分为淋巴门型、中央型、边缘型、混合型。

MethodOne hundred and six patients with cervical lymphadenopathy underwent color Doppler flow studies.The lymph node lesions were divided into four groups:reactive nodes,tuberculosis nodes,lymphadenoma and metastatic nodes.The vascular patterns of hilar type,central type,peripheral type and mixed type were assessed.

应用高频彩色多普勒超少诊断仪,观察106例淋巴结,将肿大淋巴结分为4组,反应性增生淋巴结、结核性淋巴结、淋巴瘤、转移性淋巴结,将血供模式分为淋巴门型、中央型、边缘型、混合型。

The high frequency combustion instability in liquid rocket engine LRE is analyti cally studied by usin g CFD methods.The comprehensive model and governing equations for numerical simu lation of high frequency combustion instability are presented.The PISO and MacCo rmack algorithms are compared in this study.Both methods can successfully handle combustion instability analysis.

应用CFD方法对液体火箭发动机中的高频燃烧不稳定性进行了分析研究,建立了液体火箭发动机不稳定燃烧数值模拟的综合模型和控制方程,比较了PISO和Ma cCormack两种算法,得出了两种算法均能成功应用于不稳定燃烧分析的结论。

As communicating madia is power line ,which needn't the extra line , and not take in the existing frepuncy resource.In the power system ,the power line is using steadily and reliable high press power line as the signal's trans madia,which may save a great deal of the building investment,in additional to the route is suitble ,scurity and may reuse the far away mobile signal ,of which makes this power system develop a particular communicating way ,while in number micro-wave,one point more address,optical fiber,super-high frequency repeatly renew today ,which also last developing.

由于电力线载波在电力系统中使用坚固可靠的高压电力线作为信号的传输媒介,可节省大量的通道建设投资,再加上电力线载波信息传输稳定可靠,路由合理,安全保密以及能够同时复用远动信号等特点,使得这种电力系统独有的通信方式在数字微波,一点多址,光纤,特高频等通信方式相继出现的今天仍得到持续的发展。

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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。