• BP公司的多油井个月来持续向海水中泄漏原油天然,直到七月工程人员加上控油罩止住了漏油

    BP's Macondo well spewed oil and natural gas for nearly three months, before crews installed a cap that halted the leak last month.

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  • 电梯面前缓缓关上玉芬分明看到顾长卿朝着得意一笑的她差点进去。

    The elevator door slowly closes in her in front, bore jade the aroma is clear see attend to long Qing toward she satisfiedly on smiling, morale of she almost again dash into.

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  • 流量系数动量增大而增加,动量比下,影响尤为明显;

    The film hole flow coefficient is increased with momentum ratio, especially when momentum ratio is small.

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  • 运用举反循环钻进,在满足一定条件下适当增加双壁钻具长度即可得到较大钻进

    Apply air reverse circulation drilling, appropriate increase length of twofold wall drill tools under certain conditions, may be drilling much deeper.

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  • 报道了用热线风速仪流动可视化技术带有横向扩展型轮机冷却叶片紊流进行研究

    Hot wire measurements and flow visualization are presented for studying the turbulent flow field over a flat gas turbine film cooling blade with lateral expanded holes.

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  • 本文介绍镗削活塞锥形液压刀具补偿系统工作原理,并介绍了液压刀具补偿系统应用实例

    The working principle and applied example of the air hydraulic pressure cutter bucking-out system was presented in boring a tapered pinhole in the piston.

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  • 天然计量现在流量计中的流量计为主。

    The metering of natural gas still presently depends on orifice flowmeter, one of differential pressure flowmeters.

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  • 叶片中区内部冲击射流出流冷却方式中,冷局部特性进行了实验研究

    Experimental investigation of the turbine blade local heat transfer characteristics at the inner side of the mid-chord region near film holes was conducted, with and without impingement cooling.

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  • 着重介绍了冷却、涡轮叶片流冷却技术和流量系数研究进展。

    Particular emphasis is given to the development of film cooling, internal cooling technologies and film hole discharge coefficients.

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  • 高压射流径向水平钻进技术水平施工技术之一,它在垂直瓦斯抽放煤层勘探钻布置机械水力装置对准选定的煤层部位进行扩

    As one of radial horizontal drilling techniques, high pressure water jet drilling technology is capable of using mechanical or water jet apparatus to make a cavity at the selected coal seam.

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  • 实验涡轮叶片采用冷却方案圆柱形

    The surface of a gas turbine blade was cooled by four rows of cylindrical holes in the experiment.

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  • 常规测井资料识别天然主要依据隙度测井曲线

    Identifying natural gas with conventional log data mainly is based on three porosity log curves.

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  • 以带冷却航空燃涡轮发动机涡轮叶片研究背景,引入等效概念对密布结构进行了详细的应力-应变分析

    An equivalent no-perforated plate concept is introduced in the stress-strain analysis for densely-distributed film cooling holes on turbine blades of gas turbine engines.

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  • 川西须家河组2属于致密深层藏,地层压力破裂压力

    Gas reservoir in Xujiahe Section 2 in west Sichuan are low porosity, low permeability, deep, high formation pore and fracture pressure, etc.

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  • 同时预测了有利于煤层形成勘探有利地段9- 73、21 - 11附近地区有利煤层勘探区。

    In addition, favorable locations for coal-bed gas formation and exploration are predicted, and areas nearby 21-11 and 9-73 holes are most favorable for exploration.

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  • 镀锌常用做窗纱,机械外围安全防护广泛液体过滤粮食筛选

    Galvanized square wire mesh is mostly used as window screening safely guards on machinery enclosures. it is also widely used in filtering liquid and gas, sieving grain.

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  • 液分布器空间占位通道阻力小,降低操作弹性范围大。

    This distributor use small space. has more distribute hole, little gas resistance, low pressure drop , wide operation flexibility.

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  • 介绍最近研制双向第二阀型二级脉管制冷机实验情况。

    In this paper an experimental investigation on a recently developed two stage double inlet pulse tube refrigerator with a minor orifice is introduced.

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  • 测试和实表明,带有装置的TIG冷焊枪,保护性能稳定可靠结构简单具有推广价值。

    The results show that the stable and reliable shielding gas can be obtained with a simple gas cooling TIG gun when it possesses oblique holes on the nozzle device.

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  • 结果表明弹簧外形材料特性附加室容积节流直径影响弹簧性能主要因素

    The results show that shape of the air cell, properties of the material, volume of the appended gas chamber and diameter of the throttle hole are main factors affecting the dynamics of air springs.

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  • 结果表明种进角度的进口区的换增强幅度都较大并且进口不同位置增幅差别都很大;

    The results demonstrate that the convective heat transfer intensifies greatly and varies in the region inside all the hole entrances.

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  • 计算模拟了26个每个截面的网格数达到200个,计算包括了供

    The computational domain were extended to the coolant supply plenum, and two rows of 26 film cooling holes were simulated, with about 200 cells across each orifice cross-section.

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  • 流量出流位置通道内影响很小。

    The mass flow rate and position of film outflow are less effective on the flow field in the channel.

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  • 实验发现雷诺数流量系数较大的影响

    It is found in the experiments that film hole Reynolds number and Rib Angle have great influence on film hole discharge coefficients.

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  • 结合川西地区致密砂岩地质特点复合技术进行研究

    This article studies this composite technology by taking the geologic features of low porosity and low permeability of tight gas sands in West Sichuan.

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  • 缝戽研究基础上,提出一种新型能工——板混合流消能工。

    On the basis of studies on aeration tract bucket flow energy dissipation in lower weir on soft foundation, a new type of energy dissipater was put forward.

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  • 缝戽研究基础上,提出一种新型能工——板混合流消能工。

    On the basis of studies on aeration tract bucket flow energy dissipation in lower weir on soft foundation, a new type of energy dissipater was put forward.

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